See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
25°
Humid and Mostly Clear
Feels Like: 24°
Min: 25°
Max: 31°
The next few hours will be humid and mostly clear, with today reaching 31°C and dropping to 24°C. The coming days will be drizzle
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
05:48
Sunrise
17:53
Sunset
Moon
Waxing Crescent
09:05
Moonrise
20:39
Moonset
Daily Forecast
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
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Weather in San Francisco today, September 15, 2026
Rain features in San Francisco on September 15, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise. Early hours look the most unsettled, with rain probability near 44% by 09:00. The thickest cloud arrives around 11:00, reaching about 36%.
The day peaks near 31°C and cools toward 25°C. Moisture in the air spans 75%-99%, with the highest values around 03:00. Airflow remains manageable, reaching about 1.9 km/h around 14:00.
Expect the wet theme to continue later, as rain odds reach 98% near 15:00. Cloud amounts hold near 88% around 20:00. Expect visibility near 16.1 km, with poorer spells close to 15.8 km. Expect sunrise at 05:48, sunset at 17:53, and 12 hours 4 minutes of sunlight today overall.
In short, treat September 15, 2026 in San Francisco as a damp day: pack covers, watch the wetter hours, and expect a high near 31°C.
Frequently asked questions about weather in San Francisco
How warm does it get in San Francisco?
The warmest month in San Francisco is May, with average high temperatures of 35°C. The average temperature during this period is around 30°C.
How cold does it get in San Francisco?
The coldest month in San Francisco is February, with average low temperatures of 22°C. The average temperature during this period is around 26°C.
What is the wettest time of year in San Francisco?
The wettest month in San Francisco is July, with an average of 326mm of precipitation.
What is the driest time of year in San Francisco?
The driest month in San Francisco is March, with an average of 16mm of precipitation.
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