Petaluma Weather in September

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

The climate in Petaluma during September can be summarized as warm and very dry.

September is in the fall / autumn in Petaluma and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 27°C (80°F), whilst at night 10°C (51°F) is normal.

Petaluma weather averages (imperial / metric)
Daytime temperature 26.5°C 79.6°F
Nightly temperature 10.4°C 50.6°F
Average temperature 18.4°C 65.1°F
Daily sunshine 10.2 hrs
Avg rainfall 9 mm 0.4 ins
Rainy days 2 days
Sea temperature 14.4°C 57.9°F
Humidity 68%
Windspeed 15.5kph 10 mph

On average September is the 4th driest month of the year in Petaluma with around 9mm 0.4 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.2 hours of sunshine per day.

September temperatures in Petaluma

Petaluma average temperature in September

September rainfall

Petaluma average rain in September

September hourly sunshine

Petaluma 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 Petaluma 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

Petaluma weather stats

Petaluma weather statistics
Hottest month: August 26.5°C 79.7°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 181mm 7.1ins
Map showing location of Petaluma (38.23242, -122.63665) Petaluma map pin © Google

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