Chico Weather in September

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

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

September is in the fall / autumn in Chico and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (88°F), whilst at night 13°C (55°F) is normal.

Chico weather averages (imperial / metric)
Daytime temperature 31.4°C 88.4°F
Nightly temperature 12.9°C 55.1°F
Average temperature 22.1°C 71.8°F
Daily sunshine 12.3 hrs
Avg rainfall 14 mm 0.5 ins
Rainy days 2 days
Sea temperature 14.8°C 58.7°F
Humidity 56%
Windspeed 11.9kph 7 mph

On average September is the 4th driest month of the year in Chico with around 14mm 0.5 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 12.3 hours of sunshine per day.

September temperatures in Chico

Chico average temperature in September

September rainfall

Chico average rain in September

September hourly sunshine

Chico 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 Chico 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

Chico weather stats

Chico weather statistics
Hottest month: July 34.4°C 93.9°F
Driest month: July 1mm 0ins
Sunniest month: July 15hrs
Coldest month: January 11.9°C 53.4°F
Wettest month: January 127mm 5ins
Map showing location of Chico (39.72849, -121.83748) Chico map pin © Google

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