Average annual temperature is 21.1 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: 6.4 °C
Number of sunny days: 124 days
Number of rainy days: 241 days
Look at detailed online map of Ilam
* Weather data for Ilam Nepal is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 24.9 | 25.5 | 28.1 | 31.7 | 32.2 | 33.2 | 31.1 | 32.6 | 32.1 | 29.4 | 27.6 | 24.4 |
| Average daytime temperature (°C) | 20.1 | 22.2 | 24.7 | 27.7 | 28.6 | 29.6 | 28.8 | 28.4 | 29.2 | 26.5 | 24.8 | 21.5 |
| Average temperature (°C) | 14.2 | 16.7 | 18.9 | 21.9 | 23.5 | 25.8 | 25.7 | 25.5 | 25.3 | 21.7 | 18.6 | 15.6 |
| Average night temperature (°C) | 9.1 | 11.4 | 13.3 | 16.0 | 18.3 | 22.2 | 22.9 | 23.0 | 21.6 | 17.3 | 13.4 | 10.3 |
| Absolute minimum temperature (°C) | 6.4 | 8.4 | 12.1 | 13.1 | 15.3 | 19.2 | 21.8 | 21.1 | 20.0 | 13.4 | 12.0 | 8.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.2 | 12.0 | 12.8 | 13.5 | 13.8 | 13.6 | 13.1 | 12.3 | 11.5 | 10.8 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 9.1 | 9.0 | 10.1 | 10.9 | 11.0 | 9.8 | 7.9 | 6.6 | 9.4 | 9.6 | 9.7 | 8.9 |
| Precipitation (mm) | 1 | 12 | 117 | 59 | 135 | 327 | 294 | 472 | 317 | 135 | 2 | 6 |
| Sunny days | 27 | 14 | 7 | 8 | 5 | 0 | 0 | 0 | 0 | 12 | 26 | 25 |
| Rainy days | 4 | 14 | 24 | 22 | 26 | 30 | 31 | 31 | 30 | 19 | 4 | 6 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ilam is at