Jaffna Weather in September

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

September is in the fall / autumn in Jaffna and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 33°C (91°F), whilst at night 25°C (77°F) is normal.

On average September is the 4th wettest month of the year in Jaffna with around 54mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.8 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 Jaffna in September 2025.