San Francisco, US
San Francisco Weather — Forecast With Attitude
12°C
broken clouds
San Francisco roast of the day
Cool and grey by the bay. Summer here is mostly a rumor.
That’s the polite version. Turn the attitude up in the app if you can take it.
Tomorrow in San Francisco
Clear, high 18°C / low 9°C.
Next few hours
San Francisco 7-day forecast
San Francisco weather facts
- Hottest month
- September, average high 70°F (21°C)
- NOAA NCEI U.S. Climate Normals, station SAN FRANCISCO DWTN, CA US (USW00023272), 1991-2020
- Days with measurable rain or snow
- 71 days a year
- NOAA NCEI U.S. Climate Normals, station SAN FRANCISCO DWTN, CA US (USW00023272), 1991-2020
- Wettest month
- December, 4.8 in (121 mm)
- NOAA NCEI U.S. Climate Normals, station SAN FRANCISCO DWTN, CA US (USW00023272), 1991-2020
- Coldest month
- January, average low 47°F (8°C)
- NOAA NCEI U.S. Climate Normals, station SAN FRANCISCO DWTN, CA US (USW00023272), 1991-2020
- Yearly rain and melted snow
- 22.9 in (581 mm)
- NOAA NCEI U.S. Climate Normals, station SAN FRANCISCO DWTN, CA US (USW00023272), 1991-2020
San Francisco weather questions
Why is San Francisco so cool in summer?
Fog off the cold Pacific keeps summer afternoons cool, so the warmest weather tends to wait until early autumn. The hottest month is September, average high 70°F (21°C). The warmest day in the current forecast is Wednesday, with a high of 19°C (66°F).
When is the rainy season in San Francisco?
Late autumn to spring. Downtown records measurable rain on 71 days a year, the wettest month is December, 4.8 in (121 mm), and summers are almost completely dry. The current forecast has rain on Tuesday.
San Francisco rain radar
Live precipitation over San Francisco, looped from the last hour.
Radar © RainViewer. Base map © OpenStreetMap contributors © CARTO.
What the weather’s actually like in San Francisco
San Francisco runs cool and changeable: fog pours in through the Golden Gate on summer afternoons, the warmest weather tends to arrive in early autumn, and the rain mostly falls between late autumn and spring.
Weather With Attitude gives you San Francisco’s real forecast — current conditions, hourly and 7-day, from live OpenWeatherMap data for the USA — and then tells you what it honestly thinks about it. Set the attitude from mildly sarcastic to fully sweary, or keep it clean. Severe weather is always played straight; the jokes are for the boring, beige-sky days.
Nearby cities
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