Kīhei Weather in September

The climate in Kīhei during September can be summarized as hot, humid and reasonably dry.

September is in the fall / autumn in Kīhei and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 19°C (67°F) is normal.

On average September is the 2nd driest month of the year in Kīhei with around 50mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.9 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 Kīhei in September 2025.