Santa Barbara Weather in September

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

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

September is in the fall / autumn in Santa Barbara and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 25°C (76°F), whilst at night 12°C (53°F) is normal.

Santa Barbara weather averages (imperial / metric)
Daytime temperature 24.6°C 76.2°F
Nightly temperature 11.9°C 53.3°F
Average temperature 18.2°C 64.8°F
Daily sunshine 9.8 hrs
Avg rainfall 7 mm 0.3 ins
Rainy days 2 days
Sea temperature 17.5°C 63.6°F
Humidity 74%
Windspeed 10.8kph 7 mph

On average September is the 4th driest month of the year in Santa Barbara 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 9.8 hours of sunshine per day.

September temperatures in Santa Barbara

Santa Barbara average temperature in September

September rainfall

Santa Barbara average rain in September

September hourly sunshine

Santa Barbara 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 Santa Barbara 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

Santa Barbara weather stats

Santa Barbara weather statistics
Hottest month: August 24.8°C 76.6°F
Driest month: June 3mm 0.1ins
Sunniest month: April 10.7hrs
Coldest month: January 16.8°C 62.2°F
Wettest month: January 97mm 3.8ins
Map showing location of Santa Barbara (34.42083, -119.69819) Santa Barbara map pin © Google

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