Harkers Island Weather in September

The climate in Harkers Island during September can be summarized as hot, humid and wet.

September is in the fall / autumn in Harkers Island and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (83°F), whilst at night 19°C (67°F) is normal.

On average September is the 3rd wettest month of the year in Harkers Island with around 139mm 5.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 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 Harkers Island in September 2025.