Jackson Weather in September

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

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

September is in the fall / autumn in Jackson and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (85°F), whilst at night 11°C (51°F) is normal.

Jackson weather averages (imperial / metric)
Daytime temperature 29.5°C 85.1°F
Nightly temperature 10.7°C 51.3°F
Average temperature 20.1°C 68.2°F
Daily sunshine 12.3 hrs
Avg rainfall 18 mm 0.7 ins
Rainy days 2 days
Sea temperature 15.6°C 60.2°F
Humidity 51%
Windspeed 12.2kph 8 mph

On average September is the 4th driest month of the year in Jackson with around 18mm 0.7 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 Jackson

Jackson average temperature in September

September rainfall

Jackson average rain in September

September hourly sunshine

Jackson 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 Jackson 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

Jackson weather stats

Jackson weather statistics
Hottest month: July 32.8°C 91°F
Driest month: July 4mm 0.2ins
Sunniest month: July 14.8hrs
Coldest month: January 11.5°C 52.7°F
Wettest month: January 161mm 6.3ins
Map showing location of Jackson (38.3488, -120.7741) Jackson map pin © Google

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