Hysham Weather in September

The climate in Hysham during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Hysham and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 6°C (43°F) is normal.

On average September is the 3rd wettest month of the year in Hysham with around 38mm 1.5 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 9.2 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 Hysham in September 2025.