Jāmai Weather in September

The climate in Jāmai during September can be summarized as hot, humid and very wet.

September is in the fall / autumn in Jāmai and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 20°C (68°F) is normal.

On average September is the 3rd wettest month of the year in Jāmai with around 238mm 9.4 inches of rain making it a very 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 6.3 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 Jāmai in September 2025.