Average annual temperature is 28.3 °C
Absolute maximum temperature: 42.3 °C
Absolute minimum temperature: 11.1 °C
Number of sunny days: 317 days
Number of rainy days: 48 days
Look at detailed online map of Illo
* Weather data for Illo Niger is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 35.6 | 37.3 | 40.3 | 41.6 | 42.3 | 41.1 | 39.3 | 36.2 | 39.7 | 38.9 | 37.0 | 34.5 |
| Average daytime temperature (°C) | 29.3 | 31.5 | 36.6 | 39.1 | 40.3 | 37.2 | 36.2 | 32.9 | 35.6 | 37.1 | 34.9 | 29.2 |
| Average temperature (°C) | 21.4 | 23.8 | 29.0 | 31.9 | 34.0 | 31.6 | 30.8 | 28.0 | 29.7 | 30.5 | 27.7 | 21.4 |
| Average night temperature (°C) | 14.2 | 16.9 | 21.7 | 24.8 | 27.3 | 26.5 | 25.9 | 24.1 | 24.7 | 24.0 | 20.9 | 14.4 |
| Absolute minimum temperature (°C) | 11.1 | 14.5 | 17.7 | 19.9 | 21.2 | 23.8 | 23.8 | 22.4 | 22.7 | 19.9 | 16.3 | 11.4 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.4 | 11.7 | 12.1 | 12.5 | 12.8 | 13.0 | 12.9 | 12.6 | 12.2 | 11.8 | 11.5 | 11.3 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 10.4 | 10.6 | 10.0 | 10.8 | 10.7 | 10.2 | 10.1 | 9.6 | 10.7 | 10.2 | 10.0 | 10.4 |
| Precipitation (mm) | 0 | 0 | 0 | 0 | 0 | 19 | 14 | 63 | 28 | 0 | 0 | 0 |
| Sunny days | 31 | 28 | 29 | 30 | 30 | 25 | 19 | 14 | 20 | 30 | 30 | 31 |
| Rainy days | 0 | 0 | 2 | 0 | 1 | 5 | 12 | 17 | 10 | 1 | 0 | 0 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Illo is at