Twentynine Palms Weather in September

The climate in Twentynine Palms during September can be summarized as hot and dry.

September is in the fall / autumn in Twentynine Palms and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 32°C (90°F), whilst at night 15°C (59°F) is normal.

On average September is the 4th driest month of the year in Twentynine Palms with around 15mm 0.6 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 11 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 Twentynine Palms in September 2025.