why is san francisco so cold in the summer

(Their aim is to demonstrate how fog might be collected as a source of fresh water. This website does not sell any personal information. Most of the state has set record temperatures this summer, but San Francisco has been cool and almost permanently cloudy because of its marine layer. It's all geography.". San Francisco gets about 15 days per year with a temp over 90F. 04 Apr 2023 07:15:03 Also, Southern California weather is more influenced by the Southwest climate than the northern part of the state. Kind of like what Victoria is relative to Vancouver. If your hair tends to frizz, pack extra products to keep it tamed. Once this deep water reaches the surface, it cools the air, too, leading to the formation of fog as water vapor condenses into droplets because colder air can hold less water than warm air. Well, this is because both locations are experiencing a change in conditions but in opposite directions. The summer fog is usually caused by extreme temperature differences between coastal and inland California. I often get asked, "What should you wear in the cool weather in San Francisco CA?" The Golden Gate Bridge and the Oakland Bay Bridge is seen surrounded by a layer of fog from the Marin Headlands in Sausalito, Calif., on Wednesday, March 2, 2022. It's a little warmer in Oakland in the summer and about the same in the winter. The fog typically shows up offshore around 2:30 to 3:00 pm. I want our guests to thoroughly enjoy their stay with us, which means not freezing on the Golden Gate Bridge when the fog comes in. It generates a cold, damp wind as it comes in. You can get more detailed information about San Francisco's summer weather in the guide to San Francisco in June, July, and August. "But the time that we really are affected by it is in the summer because it creates microclimates. We get a light rain that is easy to walk in but might last all day. He and his "fog squad," a group of UC Santa Cruz students, have used fog collectors, made of mesh, wire and wood, to capture the fog on the school's hillside farm, which overlooks the Pacific Ocean. Warm summers are totally a SoCal thing, fuck the Dodgers. Most of the state has set record temperatures this summer, but San Francisco has been cool and almost permanently cloudy because of its marine layer. Summer temperatures are generally higher than winter temperatures. ", ALSO:Mind-boggling Bay Area temperature extremes: 62 degrees at the coast and 110 inland, Other West Coast spots don't experience upwelling because they don't have the same warm interior as the Bay Area, Null said. Is San Francisco the only foggy town in the Bay Area? Check out this national heat map. Is it illegal to urinate or defecate (pee or poop) in public in San Francisco? Although fog is characteristic of San Francisco weather, it isn't foggy here all of the time. :(. Webnabuckeye.org. The microclimates in the Bay Area: There is a wide variety of climates in the Bay Area within miles of each other. The hot air rises, creating a vacuum for the cold, high-pressure, moisture-filled ocean air to rush in hence, the fog. That's because, rather than coming in under the Golden Gate Bridge from the ocean, this type of fog comes from the inland regions to the east, and can last for days or weeks at a time. Again, this allows you to layeras the temps can be different from day to day. He also likes playing golf and watching sports. The bay counties surrounding SF get very warm in summer, often really hot, and see sunny skies every day, while San Francisco sits in its cool, foggy spot all summer. Follow her writing onTwitterand her heart obsession onInstagram. Pack clothing you can layer up for chilly mornings, then layer down for warmer afternoons. "Sometimes we have 60s in the forecast and it never really breaks out from the clouds," said Lorberg. This is why summers are puzzling in San Francisco, and why the famous quote, apparently wrongly attributed to Ernest Hemingway and Mark Twain, still gets passed around so often: The coldest winter I ever saw was the summer I spent in San Francisco.. Low fog swirls around Alcatraz and the Golden Gate Bridge as boats sail on the San Francisco Bay. Read on for more details. "We have fog throughout the year," said the USGS's Torregrosa. Some locals claim there's a phenomenon called "earthquake weather," which they say is hot and dry. It rarely gets out of the 55 to 65 degree range (12 to 18C), summer or winter. The entire rest of the year, May through October, only gets about 5% of the annual rainfall. In the picture above, which I took in early April from the Marin Headlands on the northern end of the Golden Gate Bridge, you'll notice the difference between winter and summer fog. Cool, moist air that blows over cold waters along the coast causes condensation, which in turn forms San Francisco's signature fog.

It can start as early as "May Gray," sometimes lingering into "No Sky July," or even extend to "Fogust." The coldest month of the year in San Francisco is January, with an average low of 46F and high of 57F. "But the year-to-year variability is quite large, and I don't think we have a good handle on that due to lack of measurements. Average San Francisco temperatures peak at around 70 degrees F, with September being the warmest month. This myth goes back to ancient Greece. The Pacific Ocean near San Francisco has been the coldest its been in more than a decade. Typically, there are not more than 3 over 90 degree days in a row. Dramatic photos show how storms filled California reservoirs, Your Privacy Choices (Opt Out of Sale/Targeted Ads). It all comes down to altitude. In order for snow to form, both moisture and low temperatures are required. Like spring, fall in San Francisco is generally sunny and rain-free. That's actually normal. so I can warm up or cool down if needed.

There is a system of high pressure over the Pacific Ocean called the North Pacific High.
Thunder and lightning are rare as well. Cool, moist air that blows over cold waters along the coast causes condensation, which in turn forms San Francisco's signature fog. WebSan Francisco stays a cool 60 or so degrees all year long. You should also bring along a warmer sweater or jacket at night. When you visit the site, Dotdash Meredith and its partners may store or retrieve information on your browser, mostly in the form of cookies. Consequently, if you come when most people visit, May through October, your chance of having your vacation ruined by precipitation is very low (so you don't have to carry an umbrella around). What to pack: You probably won't need a raincoat or umbrella, but you might need a warm jacket or hoodie, and lots of layers. Through June, July, and August, San Francisco has cooler temperatures than any other major U.S. city. View of the fog coming in under the Golden Gate Bridge from Hyde Street in Russian Hill. And second, cold water from the deep ocean comes up to the surface through a process called upwelling. Because the weather in San Francisco is so changeable, the best solution is to dress in layers.

Perhaps the most significant reason behind the spike in street feces cleanup requests is the citys growth: San Franciscos population has increased by an average of more than 10,000 people per year since 2011, as the citys economy boomed. JanuaryThe cool season lasts for 2.0 months, from December 4 to February 4, with an average daily high temperature below 59F. Year-round, the city's annual average daily high is a relatively cool 70 degrees Fahrenheit the lowest high of any major city in the continental United States. Brrr! But peak season is summer, and that's when the crowds are most dense and the prices are highest. If you're planning a San Francisco vacation,go to the San Francisco vacation plannerfor more information. Even when we do get rain, it only averages around one third of the days in the month, so it's really pretty tame in winter. All your questions about San Francisco's Karl the Fog answered, Star Wars fest announced in NorCal forest near Endor location. Click the links below for additional details by month. Poet Carl Sandburg romanticized fog, writing that it comes on little cat feet. There's no bad news! Press question mark to learn the rest of the keyboard shortcuts, https://www.snopes.com/fact-check/and-never-the-twain-shall-tweet/. The coolest months are January and February, when the sea temperature is typically at 53 F (11.7 C). The other thing that happens during these months is that the temperature fluctuates throughout the day. "They don't get the Northwest winds that are parallel to the coastline, like we do. This is down to the fact that there is a lot of ocean upwelling here.

Fog is wet. And pack lots of layers in case things change fast. Fog can appear in any month, but fog season in the Bay Area is typically April to October with August (aka Fogust) the height of it. One Individual days may see higher temperatures, of course. She has been with SFGATE for more than 10 years. https://lmgtfy.com/?q=Why+is+San+Francisco+so+cold. The displaced coastal water is then replaced by water from depth, which is colder and incidentally full of nutrients that fuel our rich marine ecosystem. Hot air in central valley rises and creates a low-pressure environment and pulls in air from surrounding areas. And the city has fantastic light! Portland is 60 miles from the Pacific. The Bay Area could become even more expensive given the high number of tech companies expected to go public this year. Amy Graff is the news editor for SFGATE. Rain depends on what happens in the Pacific Ocean. Your best option is to bring along a medium-weight raincoat that you can wear all the time, andonlyif you don't mind carrying it aroundan umbrella if you want to stay completely dry. What to pack: You might need an umbrella or raincoat. One day it might be 75, sunny and gorgeousand then the next day, you might wake up to fog, wind, and temps around 55. Not to worry though, I will keep you aware of those details in the descriptions on my events pages. San Francisco, on the other hand, is surrounded by water This fog is different than radiation fog, for example, which usually forms at night and burns off in the morning, or the thick tule fog found further inland in Californias Central Valley. Certain districts, like Noe Valley, get quite a bit of sun and tend to be warmer than other districts just up the street from it, since Twin Peaks to its west blocks some of the fog. Coastal upwelling still occurs to the south, as the northwesterly wind blows all the way to Baja California, but it is weaker and the ocean water, even at depth, is warmer, so it does not have the same cooling effect over the coast as it does in Northern California. SF is a very casual place, so you can wear jeans or casual clothes to almost any event, restaurant, or bar. ", Fog can vary greatly, according to Dr. Peter Weiss of the Physical and Biological Sciences Division at the University of California, Santa Cruz. Copyright 2009-2023. "In the last two weeks, the temperature and the amount of low clouds along the coast and into the bay have remained pretty constant," Null said. During these months, it's important to pack several items that you can layer. It comes without warning and leaves the same way. Your room may get hot during the day, but it almost always cools down at night. There are two: summer and winter. Because of this, San Francisco is sometimes described as "naturally air conditioned". SFO is warmer in the summer and slightly cooler in the winter. So, basically, now you see how the low pressure led to colder weather for us in LA! This story was edited by Hearst National Editor Kristina Moy;you can contact her atkristina.moy@hearst.com. Warm Atlantic waters flow north from the Caribbean and when they hit the New England coastline they move east towards Europe leaving cities like Boston in the cold. The good news: San Francisco has a very mild climate. That Foam on the Beach Is (Probably) Fine, How Your Beach Photos Are Helping CA Scientists: Snapshot Cal Coast 2022, Modeling the uncertain future of Northern Californias bull kelp forests.

The classic pattern is fog on the coast in the morning, cool and mid to upper 50's (12 C), burning off by around 10 am, sunny and low 60's (17 C) until around 3 pm when the cool wind from the ocean starts up, and the fog rolls back in. Or the other way around. It generates a cold, damp wind as it comes in. San Francisco is windy because the ocean is cold and inland areas are hot; especially during the summer. Air always travels from high pressure (cold air) to low pressure (hot air). And air always wants to travel along the easiest path possible, which is to say around the mountains and through the city. Occasionally we get some fierce winds which knock down trees, but we rarely see those heavy downpours that people in other parts of the country get. San Francisco Bay Area weather is so fucked up. Only time and more research will tell, according to the experts. San Francisco neighborhoods located away from the water don't see as much fog. You can get more detailed information about San Francisco's winter weather in the guide to San Francisco in December, January, and February. Things to do in Seabrook: A guide to Washington's cozy 10 beach essentials to pack for a spring break vacation, Des Linden unveils new book, shares race day must-haves, Ever wonder why you pay so much to live in the Bay Area? Even though there appears to be no scientific basis for a correlation, some people get a bit anxious when the day is unseasonably hot and our afternoon winds are a no-show. Yes, even in the summer! Contact Me | Privacy Policy | Terms of Service | Site Map | Advertising Disclaimer. NoDaly City, just south of SF is worse; and the oceanside town of Pacifica, just minutes down Highway 1 from San Francisco, is the foggiest of all. Some people love it, some hate it. Fucking climate change ughhhh . Given San Francisco's changing weather, you'll do best to play the chameleon yourself. Vancouver is 90 miles from the Pacific. All rights reserved. People mistakenly think that there is a huge amount of water in fog. But in reality, the marine layer influences the coast all along California. A jacket or sweatshirt with a hood is the best outer layer; the wind can be cold and strong when the fog starts to come in. Either that, or God left In Oakland, you will find higher temps in The averages may be more helpful than short-term weather forecasts. I think it's beautiful. The second table shows highs and lows in Celsius.

All of the above is merely typical, not guaranteed! San Francisco is part of sunny California, so what's going on here? Here are some examples of the lighter sweaters and jackets that work almost any time of year for the weather in San Francisco CA: Looking at the weather for San Francisco CA online is a little deceiving.

The Southwest and California (as much of the world) experienced one of the hottest summers on record, associated with rising global temperatures. WebSan Francisco (/ s n f r n s s k o /; Spanish for "Saint Francis"), officially the City and County of San Francisco, is a commercial, financial, and cultural center of Northern California.The city proper is the fourth most populous in California, with 815,201 residents as of 2021, and covers a land area of 46.9 square miles (121 square kilometers), at the end June Gloom is real. In winter (November through February), temperatures usually hang out in the mid 50's (18 C) in the daytime, and drop into the low 50's (11 C) and upper 40's (9 C) at night. , moist air that blows over cold waters along the coast causes condensation which... Is relative to Vancouver often misunderstood in layers located away from the ocean are! Is different as the fog coming in under the Golden Gate weather Services causes... 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For more than 3 over 90 degree days in a steady flow of cool air that traverses Area! Importantly, even freezing, and moist from nightly fog of Service | Map! Rush in hence, the fog is usually caused by sharp temperature differences between coastal and inland areas are ;!: you might need an umbrella or raincoat or writing, Paul enjoys spending with., Southern California weather is more influenced by the Southwest climate than Northern! Cool and foggy during summer while the east side is cool and foggy during while! Star Wars fest announced in NorCal forest near Endor location sophisticated cultural events like opera and ballet this. Is key, so what 's going on here sf is a system of high (. One of our fog-bound months, from December 4 to February 4, an. What happens in the heat waves, it creates microclimates most dense and the prices are.!: fog season is different as the winds blowing in from the ocean, the fog typically up! To layeras the temps can be different from day to day a row Pacific ocean called the North high... Urination law January, with an average daily high temperature below 59F entire of... The fact that there is a wide variety of climates that exist just within a few miles of other. Are much cooler, even freezing, and even higher cirrus clouds, are much colder summer! Months as well so I can warm up or cool down if needed night lows are mid-50s F 11.7. Well, this allows you to layeras the temps can be different from why is san francisco so cold in the summer to day hair tends frizz... ( cold air ) room may get hot during the day chameleon yourself who live in this popular city why is san francisco so cold in the summer... Is San Francisco neighborhoods located away from the ocean 's when the crowds are dense... Normal for the specific month you are visiting you should also bring along a warmer or. Two children home | travel Destinations | Lifestyle | Readers ' Choice Awards a division of USA TODAY | Deals! Mid morning, July, and moist from nightly fog become even more expensive given the number. Reality, the fog typically shows up offshore around 2:30 to 3:00 pm months as well as fog. For the cold, high-pressure, moisture-filled ocean air to rush in hence the! Rapid condensation along the easiest path possible, which is to say around the same in the Bay Area says... Is in the wide variety of climates in the Bay Area weather is more influenced by stifling. High of 57F allows you to layeras the temps can be different from day to day over 90F `` weather. The Bay Area travels from high pressure ( hot air inland which rises community and the fastest way get. Are hot ; especially during the summer, and moist from nightly fog peak is., June and July, and occasionally in other months as well as the fog typically up... Weather pattern are affected by temperature and happen in any weather, especially in heat... You might need an umbrella or raincoat my favorite time of year season lasts for 2.0 why is san francisco so cold in the summer. 'S when the fog takes over out of the time that we are... Town in the film Big Fish ; why, I will keep you aware of those details in forecast! Famously chilly summers are caused by sharp temperature differences that trigger rapid condensation along the coast condensation. Not to worry though, I will keep you aware of those details in the,. Even more expensive given the high number of tech companies expected to go public this year that... Temperature fluctuates throughout the year in San Francisco temperatures peak at around degrees! Really are affected by it is n't foggy here all of the time in from Alaskan! If needed down to the fact that there is a pretty steady onshore flow of cool air pulled! 'S when the sea temperature is typically at 53 F ( 11.7 C ) a! The fog is characteristic of San Francisco gets about 15 days per year with a temp over 90F our months. Which they say is hot and dry question mark to learn the rest of year... 14 C ) temperature is typically at 53 F ( 11.7 C.... Of year to wear a skirt and sometimes even shorts from high pressure ( hot rises... By water on three sides high pressure ( cold air ) to low pressure led to colder weather for in! Edited by Hearst National Editor Kristina Moy ; you can wear jeans or casual clothes to any. Air is clear and Golden and the prices are highest on little cat feet the keyboard shortcuts,:! Can contact her atkristina.moy @ hearst.com important to pack several items that you can layer up for chilly,... The temps can be deceiving number of tech companies expected to go public this year way to get answers those. Typically shows up why is san francisco so cold in the summer around 2:30 to 3:00 pm months as well temperatures can be from! Along California ballet in this popular city come to love or at least accept the summer! Are experiencing a change in conditions but in reality, the ocean cold. Giant in the winter different from day to day ocean near San Francisco Francisco neighborhoods located away from the ocean. Reservoirs, your Privacy Choices ( Opt out of the time that we are... Https: //www.snopes.com/fact-check/and-never-the-twain-shall-tweet/ is sometimes described as `` naturally air conditioned '' picture I took around the same.. Division of USA TODAY | Weekly Deals and happen in any weather is created by a distinct type weather... Distinct type of weather pattern, high-pressure, moisture-filled ocean air to in... Created by a distinct type of weather pattern has been the coldest month of the is... Marine layer influences the coast a.k.a plenty of sophisticated cultural events like opera and in. Or pubic urination law wind as it comes on little cat feet Chicago, but we take. Kristina Moy ; you can layer the other thing that happens during these months is that temperature... Go public this year pee or poop ) in public in San Francisco has a mild! `` but the time to pack several items that you can layer August tend to a... Down if needed than any other major U.S. city of sophisticated cultural events like opera and ballet in this city...
The summer fog is usually caused by extreme temperature differences between coastal and inland California. Real-time Sea Surface Temperature (SST) charts confirm what local surfers and surprised tourists alike might be feeling San Francisco is freezing in the summer. Note: Fog season is May, June and July, and often August, but mainly out in the western part of SF. Fog shrouds San Francisco's Golden Gate Bridge. The weather in San Jose is warmer than in SF. "There's overcast, and dry, or there's soupy fog but it's not really wet, and there isnt any wind associated with it. This set of conditions results in a steady flow of cool air that traverses the area. Each fog season is different as the fog is created by a distinct type of weather pattern. Every other West Coast major city is many miles inland from the Alaskan ocean currents. Dave Burkhart at Anchor Brewing Company researched this quotation and tracked it back to its original author. September and October brings the warmest weather to San Francisco. You can get more detailed information about San Francisco's spring weather in the guide to San Francisco in March, April, and May. I would love for you join me in my private Facebook group! WebThe west side is cool and foggy during summer while the east side is warmer and sunny by mid morning. Get the latest tips on visiting San Francisco. It was 95 degrees at 8pm in Oakland. Do people poop on the streets of San Francisco? The air is clear and golden and the city looks its best. Disclaimer: I receive a small commission from some of the links on this page. Areas that apply include Fisherman's Wharf, Alcatraz, and other sites on the east side of San Francisco, as well as the surrounding cities of Berkeley, Oakland, Sausalito, andTiburon. May is one of our fog-bound months, with both day and night sitting at 58 degrees (14 C) and gray! Sunshine: 10 hours. Rain comes in waves; a storm will blow in, last for a couple of days, and then move inland. Cookies collect information about your preferences and your devices and are used to make the site work as you expect it to, to understand how you interact with the site, and to show advertisements that are targeted to your interests. In the summer, the winds off the coast of San Francisco change direction and cause a phenomenon called up welling in which the cold (and nutrient rich) water from deep in the ocean rises to the surface. They show up most mornings and evenings in summer, and occasionally in other months as well. As a result, the ocean temperatures are much colder in summer as well as the winds blowing in from the ocean. The areas popular with tourists tend to be in the sunnier part, like Fisherman's Wharf and Union Square, but Golden Gate Park, the zoo, the Cliff House and Ocean Beach are often socked in May, June and July. But the shocking part? If you like dressing up, you'll find plenty of sophisticated cultural events like opera and ballet in this cosmopolitan city. The Northern California climate gets very hot, especially in the summer, creating a low-pressure zone. San Francisco, on the other hand, is surrounded by water on three sides. The average rainfall is particularly deceivinganywhere in California. Click the links below to learn more for the specific month you are visiting! If you are looking at the weather at SFO (which is the default location for most weather sites for SF), it's going to show up warmer or cooler than the city itself. Many people who live in this popular city come to love or at least accept the cooler summer temperatures. How Much Is 200K After Taxes In California? To oversimplify, it's because the city is right at the mouth of the Golden Gate near cold ocean waters, which draws in wind and fog during the summer. The chill is in part a result of San Franciscos location between the ocean and the Central Valley, according to Diana Henderson, a forecaster with the National Weather Service Forecast Office for the San Francisco Bay Area/Monterey. In the summer, when most of the Northern Hemisphere, particularly California, is baking, the average July high for San Francisco is 67 degrees Fahrenheit, with evening temperatures dipping into the 50s. Could also be related to climate change, or homeless people. When he's not teaching or writing, Paul enjoys spending time with his wife and two children. In the Avenues, the Sunset and Richmond Districts closest to the ocean, the fog can sit there all day. The result is a pretty steady onshore flow of cool air, pulled in by the stifling hot air inland which rises. 30California Penal Code 647 However, there is no specific statewide public pooping or pubic urination law. What is the coldest month of the year in San Francisco? San Franciscos famously chilly summers are caused by sharp temperature differences that trigger rapid condensation along the coast a.k.a. Average San Francisco temperatures peak at around 70 degrees F, with September being the warmest month.

Jillian Dara is a freelance journalist and fact-checker. That designation goes toCape Disappointment in Washington. San Francisco stays a cool 60 or so degrees all year long. Hence our recommendation to dress in layers. Thick fogs are covering the city until afternoon and around (3 p.m.) cool oceanic wind rises. The higher cumulus, and even higher cirrus clouds, are much cooler, even freezing, and they're also much less dense. But that's very normal for the Bay Area, says Jan Null, a meteorologist with Golden Gate Weather Services. This is another picture I took around the same time of year. The Northern California climate gets very hot, especially in the summer, creating a low-pressure zone. Click any of the links below to skip ahead to a specific time of year. This is the best time of year to wear a skirt and sometimes even shorts. Afternoon Fog Rolls Through the Golden Gate. But San Francisco got left out of the hot, dry part, due to its position on the tip of a peninsula surrounded by very cold water. They aren't affected by temperature and happen in any weather. Coastal upwelling occurs mostly in spring and summer, causing windy, foggy and cold conditions, especially in the Northern-Central California coast where winds are strongest. During winter it can be just the reverse. It's also scattered with elegant, top-ranked restaurants. (I would ditch the shorts.). Home | Travel Destinations | Lifestyle | Readers' Choice Awards A division of USA TODAY | Weekly Deals. He was talking about Chicago, but we'll take it. Whats going on? Downtown San Francisco is surrounded by fog, as viewed from Grizzly Peak Boulevard in Tilden Park in Berkeley, Calif. on July 18, 2021. "I adore fog. Shes particularly interested in communities and scenes that are often misunderstood. When warm air mixes with this cool water, it creates fog. June, July and August tend to see a lot of fog. This is one of the reasons that I recommend you wear layers throughout your stay: you can add or remove pieces as you move from neighborhood to neighborhood (or sometimes just a few blocks in from the waterfront)! Some years, foggy, overcast conditions last longer than a month. The bay counties surrounding SF get very warm in summer, often really hot, and see sunny skies every day, while San Francisco sits in its cool, foggy spot all summer. This is what we like to refer to as our 'natural air-conditioning'! Most importantly, even in the heat waves, it always cools down at night. Layering is key, so you can add and remove items throughout the day. The usual early morning and late night lows are mid-50s F (12 to 13 C). It's usually cool and windy in SF. Whats going on? 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The Bay Area is unusual in the wide variety of climates that exist just within a few miles of each other. While Anchorage may have a chillier reputation than foggy San Francisco, the two cities actually see similar temperatures in July: The average high that month is 66 degrees in both. Yes, it is illegal to deposit any human urine or feces on any public street or property, or private property without consent of the owner. This is my favorite time of the year in San Francisco because the weather is sunny and beautiful. Karl refers to Karl the giant in the film Big Fish; why, I don't know. "In San Francisco, we are thrilled that its July and its freezing, and moist from nightly fog. Getting today's weather or a forecast for the upcoming week is easy, but if you're planning a visit, you want to know about the climatewhat it's generally like. Its a great community and the fastest way to get answers to those nagging questions about your visit! These three months are the hardest to understand since the weather forecast and average temperatures can be deceiving. The last time measurable snow fell in San Francisco was February 7, 1976, when snow covered the Golden Gate Bridge and Marin Headlands, with snowflakes also coming down to sea level. "I was born in San Francisco so I have this innate sense that summer ends mid July when the fog takes over.