precipitation in Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ... © US Climate Data 2020 | version 3.0 | by Your Weather Service |, Past weather December 2019 incomplete - Missing data, Average precipitation in : Av. Average precipitation in : Av. : Hours of sunshine, Hi : Average high in ºF - Lo : Average low in ºF - Pre. What to pack: Summer fog in San Francisco is colder than you can imagine. In other years, you'll hardly see a drop all winter. Some locals claim there's a phenomenon called "earthquake weather," which they say is hot and dry. Your Trip to San Francisco: The Complete Guide. Or be prepared to make an emergency sweatshirt purchase. To find out more and what causes June Gloom, check out this guide. Even though it is one of the driest months and doesn't rain, June is also the month that gets the least sun, with lots of fog that keep things chilly. You can get more detailed information about San Francisco's winter weather in the guide to San Francisco in December, January, and February. Some years, foggy, overcast conditions last longer than a month. This myth goes back to ancient Greece. If you're going from May through July, pack all the layers you think you'll need, then pack one more. Winter is a fickle season, and just looking at the averages doesn't tell the whole story because weather patterns vary a lot from year to year. When the ocean experiences El Nino conditions, it can rain a lot. If you don't know Pacific coastal weather patterns, this may sound wrong — but it's true. San Diego 74° 56° San Francisco 60° 52° San Francisco Pbs 56° 53° Sunnyvale 66° 48° Nearby locations. : Average precipitation in inch - Days precip. And chillier in the evening than you might imagine. 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. Those warm-looking, sunny beaches you see on film are far south of San Francisco. What to pack: You might need an umbrella or raincoat. And when it does rain, a whole month's rainfall often comes in just a day or two. Rain depends on what happens in the Pacific Ocean. The climate of San Francisco can be defined as "Mediterranean with cool summers". : Days with precipitation - Hours sun. San Francisco in Summer . Av. If your hair tends to frizz, pack extra products to keep it tamed. high : Average high in ºF - Av.low : Average low in ºF - Av. Station Data. Fog is wet. Golden Gate Bridge (4.34 mi) San Francisco Pbs (4.72 mi) Daly City (5.08 mi) Brisbane (6.54 mi) Sausalito (6.79 mi) Colma (6.93 mi) Betsy has been writing about California for nearly more than two decades as TripSavvy's expert on the state. They aren't affected by temperature and happen in any weather. In fact, the Fourth of July can feel colder than New Year's Eve. Your best bet to stay dry and warm is to check the forecast just before you go. 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. precipitation in. June Gloom is real. It generates a cold, damp wind as it comes in. The averages may be more helpful than short-term weather forecasts. Like spring, fall in San Francisco is generally sunny and rain-free. And chillier in the evening than you might imagine. Monthly: 1981-2010 normals It can start as early as "May Gray," sometimes lingering into "No Sky July," or even extend to "Fogust." The truth is that earthquakes start miles underground. The average rainfall is particularly deceiving anywhere in California. : Average precipitation in inch - DP : Days with precipitation - Sun : Hours of sunshine, Monthly averages San FranciscoLongitude: -122.42, Latitude: 37.78Average weather San Francisco, CA - 94102, Monthly: 1981-2010 normalsHistory: 2007-2019. Summer in San Francisco is sometimes gloomy, foggy, and chilly. Average Temperatures and Rainfall by Month. If there were one word to describe San Francisco in summer, it would be foggy. You can get more detailed information about San Francisco's fall weather in the guide to San Francisco in September, October, and November. Check the forecast before you pack to be sure your clothing covers the range of expected temperatures. Jillian Dara is a freelance travel writer and fact checker. Fog is wet. In fact, the Fourth of July can feel colder than New Year's Eve. Average humidity isn't all that high compared to other places, but the fog can turn your carefully-smoothed hairstyle into something that looks more like a haystack. If you're planning a San Francisco vacation, go to the San Francisco vacation planner for more information. And pack lots of layers in case things change fast. Spring in San Francisco is sunny and mostly rain-free, making it one of the best seasons to visit before the summer fog sets in. 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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. You can get more detailed information about San Francisco's spring weather in the guide to San Francisco in March, April, and May. precip. Don't expect to go swimming, either The ocean temperatures are far too cold unless you have an insulated wetsuit. If there were one word to describe San Francisco in summer, it would be foggy. Monthly averages San Francisco Longitude: -122.42, Latitude: 37.78 Average weather San Francisco, CA - 94102.