Sea Ranch Weather in September

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

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

September is in the fall / autumn in Sea Ranch and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 9°C (49°F) is normal.

Sea Ranch weather averages (imperial / metric)
Daytime temperature 26°C 78.8°F
Nightly temperature 9.4°C 48.9°F
Average temperature 17.7°C 63.9°F
Daily sunshine 9.6 hrs
Avg rainfall 15 mm 0.6 ins
Rainy days 3 days
Sea temperature 14.3°C 57.7°F
Humidity 70%
Windspeed 14.8kph 9 mph

On average September is the 4th driest month of the year in Sea Ranch with around 15mm 0.6 inches of rain making it a dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.6 hours of sunshine per day.

September temperatures in Sea Ranch

Sea Ranch average temperature in September

September rainfall

Sea Ranch average rain in September

September hourly sunshine

Sea Ranch 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 Sea Ranch 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

Sea Ranch weather stats

Sea Ranch weather statistics
Hottest month: July 26.7°C 80.1°F
Driest month: July 2mm 0.1ins
Sunniest month: April 10.6hrs
Coldest month: January 13.1°C 55.6°F
Wettest month: January 241mm 9.5ins
Map showing location of Sea Ranch (38.71519, -123.45445) Sea Ranch map pin © Google

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