Bolinas Weather in September

What's the weather like in Bolinas (California) in September 2025?

The climate in Bolinas during September can be summarized as mild and dry.

September is in the fall / autumn in Bolinas and is typically the warmest month of the year. Daytime maximum temperatures average around 23°C (74°F), whilst at night 11°C (52°F) is normal.

Bolinas weather averages (imperial / metric)
Daytime temperature 23.3°C 73.9°F
Nightly temperature 10.9°C 51.6°F
Average temperature 17.1°C 62.8°F
Daily sunshine 9.9 hrs
Avg rainfall 11 mm 0.4 ins
Rainy days 2 days
Sea temperature 14.4°C 57.9°F
Humidity 71%
Windspeed 16.2kph 10 mph

On average September is the 4th driest month of the year in Bolinas with around 11mm 0.4 inches of rain making it a dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.9 hours of sunshine per day.

September temperatures in Bolinas

Bolinas average temperature in September

September rainfall

Bolinas average rain in September

September hourly sunshine

Bolinas 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 Bolinas in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Bolinas weather stats

Bolinas weather statistics
Hottest month: September 23°C 73.4°F
Driest month: July 2mm 0.1ins
Sunniest month: April 10.9hrs
Coldest month: January 13.4°C 56.1°F
Wettest month: January 214mm 8.4ins
Map showing location of Bolinas (37.90937, -122.68637) Bolinas map pin © Google

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