Chittagong weather in September
September is one of the least pleasant months in Chittagong: highs of 30°C (86°F) and about 395 mm (15.6 in) of rain on average. Nights average 26°C (78°F) and cloud cover 84% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 5th warmest. Compared with August, it is about as warm and drier; October brings highs of 30°C (85°F) and 233 mm (9.2 in) of rain.
Figures are long-term averages for Chattogram, the largest city in Chittagong. See below for other places.
Is September a good time to visit Chittagong?
least pleasant month Weather score 33/100.
September is one of the least pleasant months for weather in Chittagong. For better conditions, consider Nov–Mar.
Does it rain a lot in Chittagong in September?
Yes, it is one of the rainy months: about 395 mm (15.6 in) falls in an average September. It is the 4th wettest month of the year.
How warm is Chittagong in September?
Days average 30°C (86°F) and nights 26°C (78°F).
Chittagong weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 24°C (75°F) | 13°C (55°F) | 9 mm | 25% | best |
| February | 28°C (82°F) | 16°C (61°F) | 19 mm | 26% | best |
| March | 31°C (89°F) | 21°C (69°F) | 41 mm | 36% | best |
| April | 32°C (90°F) | 24°C (76°F) | 126 mm | 48% | fair |
| May | 32°C (89°F) | 26°C (79°F) | 305 mm | 65% | least pleasant |
| June | 31°C (87°F) | 26°C (79°F) | 551 mm | 87% | least pleasant |
| July | 30°C (86°F) | 26°C (79°F) | 782 mm | 91% | least pleasant |
| August | 30°C (86°F) | 26°C (78°F) | 531 mm | 90% | least pleasant |
| September | 30°C (86°F) | 26°C (78°F) | 395 mm | 84% | least pleasant |
| October | 30°C (85°F) | 24°C (75°F) | 233 mm | 56% | least pleasant |
| November | 28°C (82°F) | 20°C (67°F) | 56 mm | 30% | best |
| December | 25°C (76°F) | 15°C (59°F) | 14 mm | 28% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Chittagong in September
Weather can differ a lot within Chittagong: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Chattogram | 30°C (86°F) | 26°C (78°F) | 395 mm | least pleasant |
| Comilla | 30°C (86°F) | 25°C (76°F) | 292 mm | least pleasant |
| Hāthazāri | 30°C (86°F) | 26°C (78°F) | 395 mm | least pleasant |
| Brāhmanbāria | 31°C (87°F) | 25°C (77°F) | 263 mm | least pleasant |
| Cox’s Bāzār | 29°C (84°F) | 27°C (81°F) | 672 mm | least pleasant |
| Chāndpur | 30°C (86°F) | 26°C (78°F) | 326 mm | least pleasant |
| Ashuganj City | 31°C (87°F) | 25°C (77°F) | 263 mm | least pleasant |
| Karnaphuli | 30°C (85°F) | 23°C (74°F) | 310 mm | least pleasant |
| Maijdi | 30°C (86°F) | 25°C (77°F) | 367 mm | least pleasant |
| Rangamati | 30°C (85°F) | 23°C (74°F) | 310 mm | least pleasant |
| Bibir Hat | 30°C (86°F) | 26°C (78°F) | 395 mm | least pleasant |
| Feni | 30°C (86°F) | 25°C (77°F) | 367 mm | least pleasant |