Crystal City Weather in September

The climate in Crystal City during September can be summarized as hot and reasonably dry.

September is in the fall / autumn in Crystal City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 34°C (93°F), whilst at night 22°C (71°F) is normal.

On average September is the 2nd wettest month of the year in Crystal City with around 80mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.5 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 Crystal City in September 2025.