Jackson Weather in September

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

September is in the fall / autumn in Jackson and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 19°C (67°F), whilst at night 1°C (33°F) is normal.

On average September is the 6th wettest month of the year in Jackson with around 36mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

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

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.