See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:58
Sunrise
19:09
Sunset
Moon
Waxing Crescent
12:47
Moonrise
21:28
Moonset
Daily Forecast
Today
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Air Quality Data Available
Upgrade to access real-time air quality data for San Francisco.
Resources
UV Index
Humidity
Weather in San Francisco today, September 16, 2026
Expect a muted, overcast feel in San Francisco on September 16, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. The first half of the day looks overcast, as cloud amounts reach about 100% around 02:00. Brighter weather, if it comes, waits until later.
Expect highs of 23°C and cooler readings close to 14°C. Expect humidity between 64% and 99%, most humid near 07:00. Expect gentle winds, highest near 15:00 at 6.7 km/h.
Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 12.6 km, though it can fall to 0.1 km. Expect sunrise at 06:58, sunset at 19:09, and 12 hours 11 minutes of sunlight today overall.
Taken together, overcast skies in San Francisco on September 16, 2026 favour indoor or covered options, with temperatures near 23°C.
Frequently asked questions about weather in San Francisco
How warm does it get in San Francisco?
The warmest month in San Francisco is September, with average high temperatures of 20°C. The average temperature during this period is around 17°C.
How cold does it get in San Francisco?
The coldest month in San Francisco is December, with average low temperatures of 9°C. The average temperature during this period is around 11°C.
What is the wettest time of year in San Francisco?
The wettest month in San Francisco is January, with an average of 119mm of precipitation.
What is the driest time of year in San Francisco?
The driest month in San Francisco is August, with an average of 1mm of precipitation.
Explore more weather forecasts
- Daly City, California
- New York City, New York
- Emeryville, California
- Los Angeles, California
- South San Francisco, California
- Brooklyn, New York
- Oakland, California
- Chicago, Illinois
- Alameda, California
- Houston, Texas
- Tamalpais-Homestead Valley, California
- Queens, New York
- San Bruno, California
- Phoenix, Arizona
- Albany, California
- Philadelphia, Pennsylvania
