San Francisco weather
At 11:30 AM local time it was cloudy and 17°C (63°F). Mostly light, on-and-off rain; heavier around 4 AM (2.3 mm total). Best months for weather: May–Oct. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for San Francisco, California, United States.
Current conditions
- Clouds
- 91%
- Chance of rain
- 1%
- Rain
- 0.0 mm/h
Hourly Forecast
Mostly light, on-and-off rain; heavier around 4 AM (2.3 mm total)
Daily Forecast
Best Time to Visit
Peak season May–OctOff season Dec–Feb
About San Francisco weather
Is it raining in San Francisco right now?
No. It’s cloudy and 17° right now. Mostly light, on-and-off rain; heavier around 4 AM (2.3 mm total).
What’s the weather like in San Francisco this week?
Over the next 7 days, expect highs of 16–21° and lows of 10–14°. Rain is likely on 2 of 7 days (Sunday, Tuesday). The driest day looks like Monday.
Has it been raining in San Francisco lately?
Barely. The past 7 days were mostly dry, with 0.0 mm of rain in total.
What should I pack for San Francisco?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
San Francisco weather by month
When is the best time to visit San Francisco?
Based on weather alone, the best time to visit San Francisco is May–Oct, according to NASA's 2001–2025 climate averages. Dec–Feb tends to be the least pleasant. Average highs run from 13°C (55°F) in January to 23°C (74°F) in September.
What is the rainiest month in San Francisco?
December is the wettest month, with about 138 mm (5.4 in) of rain on average. August is the driest, with about 1 mm (0.0 in).
What is the hottest month in San Francisco?
September is the warmest, with average highs of 23°C (74°F) and lows of 12°C (54°F). January is the coolest, with highs of 13°C (55°F) and lows of 6°C (42°F).
Does San Francisco have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is December at about 138 mm (5.4 in).
How warm is the sea in San Francisco?
The sea is warmest in September at about 17°C (62°F) and coolest in January at about 13°C (55°F). It stays cool all year.
San Francisco weather month by month
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine, forecast and current conditions from Open-Meteo. Page updated . How we rate months