Stockton Weather in September

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

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

September is in the fall / autumn in Stockton and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (88°F), whilst at night 14°C (57°F) is normal.

Stockton weather averages (imperial / metric)
Daytime temperature 31°C 87.7°F
Nightly temperature 13.7°C 56.6°F
Average temperature 22.3°C 72.1°F
Daily sunshine 11.8 hrs
Avg rainfall 9 mm 0.3 ins
Rainy days 1 days
Sea temperature 14.9°C 58.9°F
Humidity 54%
Windspeed 13.3kph 8 mph

On average September is the 5th driest month of the year in Stockton with around 9mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.8 hours of sunshine per day.

September temperatures in Stockton

Stockton average temperature in September

September rainfall

Stockton average rain in September

September hourly sunshine

Stockton 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 Stockton 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

Stockton weather stats

Stockton weather statistics
Hottest month: July 33.8°C 92.8°F
Driest month: July 2mm 0.1ins
Sunniest month: July 14.1hrs
Coldest month: December 11.5°C 52.7°F
Wettest month: January 72mm 2.8ins
Map showing location of Stockton (37.9577, -121.29078) Stockton map pin © Google

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