San Francisco Weather in May

What's the weather like in San Francisco (California) in May 2025?

The climate in San Francisco during May can be summarized as mild and very dry.

May is in the spring in San Francisco and is typically the 6th warmest month of the year. Daytime maximum temperatures average around 18°C (65°F), whilst at night 10°C (50°F) is normal.

San Francisco weather averages (imperial / metric)
Daytime temperature 18.1°C 64.5°F
Nightly temperature 10°C 49.9°F
Average temperature 14°C 57.2°F
Daily sunshine 11.4 hrs
Avg rainfall 7 mm 0.3 ins
Rainy days 3 days
Sea temperature 11.8°C 53.2°F
Humidity 70%
Windspeed 20.5kph 13 mph

On average May is the 5th driest month of the year in San Francisco with around 7mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.4 hours of sunshine per day.

May temperatures in San Francisco

San Francisco average temperature in May

May rainfall

San Francisco average rain in May

May hourly sunshine

San Francisco average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Francisco in May 2024.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Francisco weather stats

San Francisco weather statistics
Hottest month: September 21.4°C 70.5°F
Driest month: July 1mm 0ins
Sunniest month: April 11hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 125mm 4.9ins
Map showing location of San Francisco (37.77493, -122.41942) San Francisco map pin © Google

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