Chittagong Weather in September
What's the weather like in Chittagong (Chittagong) in September 2025?
The climate in Chittagong during September can be summarized as very hot, humid and very wet.
September is in the fall / autumn in Chittagong and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 25°C (77°F) is normal.
| Daytime temperature | 31.1°C 88°F |
|---|---|
| Nightly temperature | 24.9°C 76.8°F |
| Average temperature | 28°C 82.4°F |
| Daily sunshine | 4 hrs |
| Avg rainfall | 277 mm 10.9 ins |
| Rainy days | 14 days |
| Sea temperature | 29°C 84.3°F |
| Humidity | 85% |
| Windspeed | 4.7kph 3 mph |
On average September is the 4th wettest month of the year in Chittagong with around 277mm 10.9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 4 hours of sunshine per day.
September temperatures in Chittagong
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 Chittagong in September 2025.
Other monthly averages
Best places to visit in September
Chittagong weather stats
| Hottest month: | May | 32.2°C 90°F |
|---|---|---|
| Driest month: | January | 6mm 0.2ins |
| Sunniest month: | January | 9.2hrs |
| Coldest month: | January | 25.4°C 77.7°F |
| Wettest month: | July | 745mm 29.3ins |
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