South San Francisco Weather in September

What's the weather like in South San Francisco (California) in September 2024?

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

September is in the fall / autumn in South San Francisco and is typically the warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 12°C (54°F) is normal.

South San Francisco weather averages (imperial / metric)
Daytime temperature 22.4°C 72.3°F
Nightly temperature 12.4°C 54.3°F
Average temperature 17.4°C 63.3°F
Daily sunshine 10 hrs
Avg rainfall 7 mm 0.3 ins
Rainy days 2 days
Sea temperature 14.4°C 57.9°F
Humidity 71%
Windspeed 16.6kph 10 mph

On average September is the 4th driest month of the year in South 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 10 hours of sunshine per day.

September temperatures in South San Francisco

South San Francisco average temperature in September

September rainfall

South San Francisco average rain in September

September hourly sunshine

South San Francisco average rain in September

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 South San Francisco in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

South San Francisco weather stats

South San Francisco weather statistics
Hottest month: September 22.2°C 72°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 135mm 5.3ins
Map showing location of South San Francisco (37.65466, -122.40775) South San Francisco map pin © Google

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