Death Valley Weather in September

The climate in Death Valley during September can be summarized as very hot and very dry.

September is in the fall / autumn in Death Valley and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a hot 40°C (104°F), whilst at night 24°C (74°F) is normal.

On average September is the 5th wettest month of the year in Death Valley with around 4mm 0.2 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.

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 Death Valley in September 2025.