Plains Weather in September

The climate in Plains during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Plains and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (84°F), whilst at night 15°C (58°F) is normal.

On average September is the 4th wettest month of the year in Plains with around 63mm 2.5 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 Plains in September 2025.