Hilsa Weather in September
What's the weather like in Hilsa (Bihār) in September 2025?
The climate in Hilsa during September can be summarized as very hot, humid and very wet.
September is in the fall / autumn in Hilsa and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 26°C (78°F) is normal.
| Daytime temperature | 32.4°C 90.3°F |
|---|---|
| Nightly temperature | 25.8°C 78.4°F |
| Average temperature | 29.1°C 84.4°F |
| Daily sunshine | 4.7 hrs |
| Avg rainfall | 210 mm 8.3 ins |
| Rainy days | 8 days |
| Sea temperature | 26.7°C 80.1°F |
| Humidity | 79% |
| Windspeed | 5.8kph 4 mph |
On average September is the 3rd wettest month of the year in Hilsa with around 210mm 8.3 inches of rain making it a very wet 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 4.7 hours of sunshine per day.
September temperatures in Hilsa
September rainfall
September hourly sunshine
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 Hilsa in September 2025.
Other monthly averages
Best places to visit in September
Hilsa weather stats
| Hottest month: | May | 38.6°C 101.5°F |
|---|---|---|
| Driest month: | December | 3mm 0.1ins |
| Sunniest month: | April | 9.3hrs |
| Coldest month: | January | 22.8°C 73°F |
| Wettest month: | July | 290mm 11.4ins |
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