Palm Desert Weather in September

The climate in Palm Desert during September can be summarized as hot and very dry.

September is in the fall / autumn in Palm Desert and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 35°C (96°F), whilst at night 19°C (66°F) is normal.

On average September is the 5th driest month of the year in Palm Desert with around 8mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.6 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 Palm Desert in September 2025.