Sebastopol Weather in September

The climate in Sebastopol during September can be summarized as cool and a little damp.

September is in the spring in Sebastopol and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 4°C (39°F) is normal.

On average September is the 2nd wettest month of the year in Sebastopol with around 92mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.6 hours of sunshine per day.

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 Sebastopol in September 2024.