Mumbai Weather in September

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

September is in the fall / autumn in Mumbai and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (87°F), whilst at night 24°C (76°F) is normal.

On average September is the 4th wettest month of the year in Mumbai with around 346mm 13.6 inches of rain making it a very wet time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.2 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 Mumbai in September 2025.