Nannilam Weather in September

The climate in Nannilam during September can be summarized as very hot, humid and damp.

September is in the fall / autumn in Nannilam and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (93°F), whilst at night 25°C (78°F) is normal.

On average September is the 5th wettest month of the year in Nannilam with around 106mm 4.2 inches of rain making it a damp time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.6 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 Nannilam in September 2025.