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San Francisco Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Francisco.
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Climate overview of San Francisco
With consistently stable weather, San Francisco, Riviera Nayarit, Mexico, sees little seasonal temperature change. Daytime highs average 29°C (84°F), ranging from 31°C (88°F) in August to 26°C (79°F) in February.
Rainfall is high, totalling around 1002 mm (39 in) per year. September is the wettest month and April the driest. The city also experiences a distinct dry season from November to May.
San Francisco Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Francisco - and find the best time to visit.
Monthly Temperature in San Francisco
The climate in San Francisco remains fairly constant, offering comfortable temperatures throughout the year. Average maximum daytime temperatures range from a very warm 31°C (88°F) in August, the warmest time of the year, to a comfortable 26°C (79°F) during cooler months like February.
At night, you can expect temperatures ranging from 27°C (81°F) in August to around 21°C (70°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Francisco
San Francisco is known for its substantial rainfall, with annual precipitation reaching 1002 mm (39 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, September it receives heavy rainfall, averaging 254 mm (10 in) of precipitation, recorded across 18 rainy days. In contrast, the driest month April brings less rainfall, with 2.4 mm (0.1 in) over a single rainy day. For more details, please visit our San Francisco Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Humidity in San Francisco by Month
The relative humidity is high throughout the year in San Francisco.
The city experiences its highest humidity in August, reaching 70%. In February, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Puerto Vallarta, Mexico (37 KM, 23 Miles).
Best Time to Visit San Francisco
For comfortable weather, consider visiting San Francisco in January, February, March, April, May, November and December. Conditions are usually least favourable in August and September.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
excellent
Feb
excellent
Mar
excellent
Apr
excellent
May
excellent
Jun
mixed
Jul
mixed
Aug
very wet
Sep
very wet
Oct
mixed
Nov
excellent
Dec
excellent
- Best overall: January, February, March, April, May, November and December
- Warmest weather: June, July, August, September and October
- Wettest months: June, July, August, September and October, when rainfall is highest.
- Seasonal pattern: A distinct dry season from November to May
Frequently asked questions about the climate in San Francisco
What is the best time to visit San Francisco?
January, February, March, April, May, November and December typically offer the most optimal weather in San Francisco. In contrast, August and September tend to have less optimal conditions. San Francisco has a distinct dry season from November to May.
What temperatures can I expect in San Francisco?
Daytime highs range from 26°C (79°F) in February to 31°C (88°F) in August. Nighttime lows range from 21°C (70°F) to 27°C (81°F). Temperatures stay relatively stable year-round.
How much rain does San Francisco get?
Annual rainfall is around 1002 mm (39 in). September is the wettest month with 254 mm (10 in), while April is the driest with 2.4 mm (0.1 in).
San Francisco 3-Day Forecast
San Francisco on the map
San Francisco is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
Los Cabos32°C (90°F) Puerto Peñasco30°C (86°F) Tulum
30°C (86°F) Puerto Vallarta29°C (84°F) Cancún30°C (86°F) Playa del Carmen30°C (86°F) Mexico City
22°C (72°F) Bucket list
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