Climate averages 1991–2020
Sylhet weather
in August.
A hot, very wet month: the warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Sylhet: daytime highs average 30.4°C and nights cool to about 25.1°C. By daytime temperature it is the warmest month of the year.
Expect about 733 mm of rain on roughly 31 days, which makes August a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 00 min on an average August day.
The nearest other city in this atlas is Sunāmganj (51 km away). In August its highs average 29.4°C, 1.0°C cooler than Sylhet, with 723 mm of rain.
Among the 63 cities listed in Bangladesh, Sylhet ranks joint 48th of 63 for the warmest August highs and 63rd of 63 for the driest August (rainfall, lowest first). The mean August high of those 63 cities is 30.7°C; Sylhet is 0.3°C cooler than that mean.
From August to September, average highs fall by 0.3°C to 30.1°C, and monthly rainfall falls from 733 mm to 523 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sylhet climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.5°C11.6°C | 11.6°C | 10 | 1.8 | 10.811 h |
| February | 25.8°C13.7°C | 13.7°C | 48 | 4.7 | 11.311 h |
| March | 28.6°C17.4°C | 17.4°C | 186 | 11.2 | 12.012 h |
| April | 29.4°C20.9°C | 20.9°C | 559 | 21.4 | 12.713 h |
| May | 29.8°C23.1°C | 23.1°C | 759 | 27.6 | 13.313 h |
| June | 30.0°C24.7°C | 24.7°C | 953 | 29.5 | 13.714 h |
| July | 30.1°C25.0°C | 25.0°C | 940 | 30.8 | 13.514 h |
| August, selected | 30.4°C25.1°C | 25.1°C | 733 | 30.7 | 13.013 h |
| September | 30.1°C24.5°C | 24.5°C | 523 | 27.6 | 12.312 h |
| October | 29.3°C22.1°C | 22.1°C | 217 | 14.8 | 11.612 h |
| November | 27.3°C17.3°C | 17.3°C | 28 | 2.3 | 11.011 h |
| December | 24.7°C13.3°C | 13.3°C | 12 | 1.0 | 10.611 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Sunāmganj in AugustBangladesh · 51 kmHigh 29.4°C · Low 24.6°C · 723 mm rain
- Habiganj in AugustBangladesh · 74 kmHigh 31.0°C · Low 25.4°C · 341 mm rain
- Shillong in AugustIndia · 74 kmHigh 23.5°C · Low 18.9°C · 558 mm rain
- Silchar in AugustIndia · 94 kmHigh 30.3°C · Low 25.0°C · 390 mm rain
- Netrakona in AugustBangladesh · 115 kmHigh 31.0°C · Low 25.3°C · 422 mm rain
- Kishorganj in AugustBangladesh · 121 kmHigh 31.1°C · Low 25.5°C · 317 mm rain
- Brāhmanbāria in AugustBangladesh · 128 kmHigh 31.0°C · Low 25.5°C · 277 mm rain
- Ashuganj City in AugustBangladesh · 129 kmHigh 30.9°C · Low 25.5°C · 277 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sylhet) is explained once on the Sylhet year overview and on the Sources, method and limits page.