Average temperature in September is 28.7 °C
Average daytime temperature is 32.7 °C
Average night temperature is 25.5 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: 24 °C
Number of sunny days: 3
Number of rainy days: 27
Number of snow days:
Precipitation sum: 401 mm
* Weather data for Sylhet Bangladesh is based on climate observations for 2023 year
| September (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 32 | 32.3 | 35.1 | 34.5 | 36.4 | 35.5 | 31.8 | 30.2 | 32.2 | 32.5 | 32.5 | 31.8 | 32.3 | 32.8 | 33.2 | 33.1 | 34.7 | 31.7 | 31.3 | 32.8 | 32 | 30.8 | 31.5 | 32.3 | 32.5 | 32.9 | 32.8 | 34.9 | 35.2 | 28.9 |
| Apparent max temperature | 40.4 | 41.3 | 42.9 | 44 | 45.5 | 43.6 | 40 | 36.8 | 39.7 | 41.6 | 41.9 | 40 | 40.4 | 40.9 | 40.7 | 42.1 | 44.1 | 38.3 | 37.9 | 40 | 39.9 | 38.2 | 39.7 | 39.4 | 40.2 | 42 | 41.3 | 44.5 | 41.6 | 35.1 |
| Mean temperature | 28.7 | 28.3 | 30.3 | 30.3 | 31 | 30.4 | 28.4 | 26.6 | 28.9 | 28.6 | 28.5 | 28.4 | 28.5 | 28.5 | 29.6 | 29.9 | 30.2 | 28.7 | 27.4 | 27.3 | 26.5 | 26.3 | 26.6 | 28 | 28.7 | 29.3 | 29.5 | 30.6 | 30.8 | 27 |
| Apparent mean temperature | 31 | 32.1 | 31.7 | 32.3 | 33.1 | 30.5 | 31.4 | 30.9 | 31.7 | 31.9 | 31 | 30.7 | 30.2 | 30.5 | 32.2 | 32.9 | 30.8 | 31.7 | 29.7 | 29.7 | 29 | 29 | 29.9 | 30.3 | 29.9 | 31.6 | 33.1 | 33.3 | 32.4 | 31.1 |
| Minimum temperature | 25.5 | 25.8 | 25.4 | 26.2 | 26.5 | 25.4 | 25.7 | 25.3 | 25.3 | 25.9 | 25.5 | 25.4 | 25.2 | 25.5 | 26 | 26.4 | 25.5 | 25.8 | 24.9 | 24.6 | 24 | 24.2 | 24.6 | 24.8 | 25 | 25.9 | 26.5 | 26.9 | 26.5 | 25.7 |
| Apparent min temperature | 35.6 | 35.3 | 36.9 | 37.9 | 38.4 | 37.2 | 35.1 | 32.6 | 35.5 | 35.8 | 35.3 | 35.1 | 34.9 | 34.9 | 35.9 | 37.1 | 37.4 | 34.9 | 33.3 | 33.1 | 32.2 | 32.1 | 32.7 | 34 | 35.1 | 36.5 | 36.7 | 38 | 37 | 33.2 |
| September | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 12.6 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12 | 12 | 12 | 12 | 11.9 |
| Sunshine duration (h) | 6.5 | 8.2 | 11.8 | 11.8 | 11.8 | 11.7 | 7.9 | 1.9 | 10.8 | 9.1 | 10.6 | 7 | 7.9 | 9.8 | 11.5 | 11.5 | 11.4 | 8.5 | 5.6 | 7.3 | 7.7 | 8.2 | 9.6 | 10.3 | 10.4 | 11 | 11 | 11 | 10.9 | 2 |
| Precipitation (mm) | 1.5 | 5 | 13.9 | 0 | 0 | 24 | 16 | 19.8 | 6.7 | 13.5 | 12.6 | 17.6 | 25.2 | 13.5 | 0.4 | 0.3 | 10 | 17.7 | 15.9 | 56.6 | 53.4 | 19 | 19.5 | 0.8 | 0.2 | 0.6 | 1 | 0 | 0.1 | 36.1 |
| Precipitation hours | 11 | 12 | 5 | 0 | 0 | 6 | 18 | 21 | 9 | 13 | 15 | 20 | 13 | 8 | 1 | 3 | 3 | 9 | 16 | 16 | 22 | 17 | 13 | 4 | 2 | 4 | 4 | 0 | 1 | 9 |
| Wind speed (m/s) | 8.2 | 9.7 | 13 | 8.6 | 13 | 15.4 | 9.6 | 12.2 | 7.3 | 7.9 | 10.4 | 11 | 11.2 | 15.5 | 8.8 | 8.7 | 22.7 | 10.5 | 9.8 | 12.1 | 16.3 | 11.6 | 10 | 10.6 | 8.7 | 8.3 | 7 | 7 | 19.2 | 8.7 |
In September 2023, the highest daytime temperature in Sylhet was 36.4°C.
While the minimum temperature at night dropped to 24°C.
The average nighttime and daytime temperatures during September in Sylhet are 25.5°C and 32.7°C respectively.
The precipitation sum in September is about 401 mm.