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The weather in
San Francisco
See today's weather and the 14-day forecast for San Francisco. Search another place to look ahead instantly.
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San Francisco, California
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next 24 hours
Rain forecast for San Francisco
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looking ahead in San Francisco
The next 14 days
San Francisco weather
Weather in San Francisco
See the forecast for San Francisco in one clear overview. From temperature and wind to the chance of rain: plan a walk across the Golden Gate Bridge or an afternoon exploring the waterfront with up-to-date information.
Today and the next 14 days
The forecast for San Francisco is updated daily. Check the temperature, wind and chance of rain hour by hour, and use the 14-day outlook to plan ahead and spot which days look best for being outside.
Practical weather notes for San Francisco
San Francisco has a famously localised climate, where fog rolling in off the cold Pacific can keep one neighbourhood cool and grey while another just a few kilometres inland stays warm and sunny on the same afternoon. Summer is often cooler and foggier than spring or autumn, which can surprise first-time visitors.
Seasons in San Francisco
Rain is concentrated in the winter months, while summer stays dry but can still feel chilly near the coast because of the fog. September and October are usually the warmest, sunniest stretch of the year.
Frequently asked questions
How often is the forecast updated?
The live weather data refreshes several times a day, so you're always seeing the latest forecast for San Francisco.
Is the 14-day forecast reliable?
The first few days are usually the most accurate. Further ahead, the forecast mainly shows a trend rather than the exact weather at a specific hour.
What should I check before heading outside?
Look at the combination of rain, wind and feels-like temperature. A short trip can handle a passing shower, but a longer walk or bike ride benefits from a more stable stretch of weather.
climate
Climate in San Francisco by month
Planning a trip to San Francisco? Below are the average daily high and low temperatures and the rainfall for each month, plus the sea temperature. For the coming days, see the forecast above.
| Month | Avg high | Avg low | Rain | Sea |
|---|---|---|---|---|
| January | 13.7°C (57°F) | 7.7°C (46°F) | 124 mm (4.9 in) | 12.2°C (54°F) |
| February | 14.9°C (59°F) | 7.9°C (46°F) | 89 mm (3.5 in) | 12.3°C (54°F) |
| March | 15.0°C (59°F) | 9.0°C (48°F) | 94 mm (3.7 in) | 12.4°C (54°F) |
| April | 16.1°C (61°F) | 9.9°C (50°F) | 34 mm (1.3 in) | 12.9°C (55°F) |
| May | 17.0°C (63°F) | 11.2°C (52°F) | 17 mm (0.7 in) | 13.4°C (56°F) |
| June | 19.2°C (67°F) | 12.7°C (55°F) | 1 mm (0.0 in) | 14.3°C (58°F) |
| July | 19.3°C (67°F) | 13.4°C (56°F) | 1 mm (0.0 in) | 15.0°C (59°F) |
| August | 20.1°C (68°F) | 14.2°C (58°F) | 1 mm (0.0 in) | 15.6°C (60°F) |
| September | 21.2°C (70°F) | 14.3°C (58°F) | 3 mm (0.1 in) | 16.6°C (62°F) |
| October | 20.6°C (69°F) | 12.8°C (55°F) | 29 mm (1.1 in) | 16.2°C (61°F) |
| November | 16.4°C (62°F) | 9.7°C (49°F) | 59 mm (2.3 in) | 13.9°C (57°F) |
| December | 13.5°C (56°F) | 7.7°C (46°F) | 129 mm (5.1 in) | 12.9°C (55°F) |
Source: ERA5 reanalysis via Open-Meteo, 2015-2024; sea temperature: Open-Meteo Marine, 2023-2025. Model averages for a grid cell, not official station records.
Best time to visit San Francisco
The warmest month in San Francisco is September, with an average high of 21.2°C (70°F). The coolest is December, at 13.5°C (56°F). The wettest month is December, with about 129 mm (5.1 in) of rain. Average highs stay below 25°C (77°F) all year. For sightseeing and walking, with highs between 18 and 27°C (64 to 81°F), June to October are the most comfortable. The sea is warmest in September, at 16.6°C (62°F), and coolest in January, at 12.2°C (54°F). It doesn't reach 21°C (70°F) in any month.
Climate FAQ
What is the warmest month in San Francisco?
September, with an average high of 21.2°C (70°F) and an average low of 14.3°C (58°F) (averages for 2015-2024).
What is the wettest month in San Francisco?
December, with about 129 mm (5.1 in) of rain. The driest month is June.
When can you swim in the sea in San Francisco?
The sea stays below 21°C (70°F) on average; it is warmest in September, at 16.6°C (62°F).
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