Average annual temperature is 25.8 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: 9.7 °C
Number of sunny days: 168 days
Number of rainy days: 197 days
Look at detailed online map of Helāi
* Weather data for Helāi Bangladesh is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 29.9 | 33.6 | 34.9 | 40.0 | 38.6 | 38.2 | 34.3 | 35.3 | 33.9 | 33.3 | 32.5 | 29.9 |
| Average daytime temperature (°C) | 25.2 | 29.5 | 31.6 | 35.1 | 34.4 | 34.1 | 32.7 | 32.4 | 31.8 | 31.3 | 29.4 | 25.4 |
| Average temperature (°C) | 18.5 | 22.5 | 25.1 | 28.5 | 28.9 | 29.7 | 29.1 | 28.6 | 28.1 | 26.6 | 23.6 | 19.7 |
| Average night temperature (°C) | 12.9 | 16.1 | 19.8 | 22.8 | 24.6 | 26.8 | 26.3 | 25.9 | 25.5 | 22.5 | 18.4 | 15.0 |
| Absolute minimum temperature (°C) | 9.7 | 11.9 | 17.4 | 19.8 | 22.6 | 24.6 | 25.3 | 24.6 | 24.0 | 19.6 | 15.1 | 11.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.9 | 11.4 | 12.0 | 12.7 | 13.3 | 13.5 | 13.4 | 12.9 | 12.3 | 11.6 | 11.0 | 10.7 |
| Daylight minimum duration (h) | 10.0 | 11.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.6 | 9.9 | 9.3 | 10.5 | 10.2 | 7.5 | 10.0 | 8.0 | 7.9 | 9.1 | 9.5 | 8.6 |
| Precipitation (mm) | 0 | 1 | 116 | 60 | 265 | 313 | 231 | 355 | 338 | 166 | 28 | 45 |
| Sunny days | 29 | 25 | 13 | 18 | 6 | 4 | 0 | 1 | 1 | 19 | 25 | 27 |
| Rainy days | 2 | 3 | 18 | 12 | 25 | 26 | 31 | 30 | 29 | 12 | 5 | 4 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Helāi is at