San Bruno Weather in September

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

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

September is in the fall / autumn in San Bruno 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.

San Bruno 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 San Bruno 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 San Bruno

San Bruno average temperature in September

September rainfall

San Bruno average rain in September

September hourly sunshine

San Bruno 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 San Bruno 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

San Bruno weather stats

San Bruno 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 San Bruno (37.63049, -122.41108) San Bruno map pin © Google

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