Average annual temperature is 13.1 °C
Absolute maximum temperature: 28.6 °C
Absolute minimum temperature: 0.7 °C
Number of sunny days: 93 days
Number of rainy days: 272 days
Look at detailed online map of Illien
* Weather data for Illien France is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.5 | 12.9 | 13.7 | 16.8 | 20.1 | 25.5 | 23.7 | 25.9 | 28.6 | 22.5 | 15.6 | 14.8 |
| Average daytime temperature (°C) | 10.0 | 10.3 | 11.2 | 13.2 | 16.5 | 20.4 | 18.6 | 18.9 | 20.3 | 17.0 | 13.0 | 12.1 |
| Average temperature (°C) | 8.6 | 8.0 | 9.7 | 10.6 | 13.5 | 17.2 | 16.9 | 16.9 | 17.7 | 14.9 | 11.6 | 10.9 |
| Average night temperature (°C) | 7.0 | 5.8 | 8.1 | 8.0 | 10.8 | 14.2 | 15.0 | 14.9 | 15.1 | 12.9 | 10.3 | 9.5 |
| Absolute minimum temperature (°C) | 1.0 | 0.7 | 1.2 | 3.3 | 7.5 | 10.3 | 11.2 | 11.9 | 10.5 | 8.8 | 5.4 | 3.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.8 | 10.2 | 11.9 | 13.7 | 15.2 | 16.0 | 15.6 | 14.3 | 12.6 | 10.8 | 9.2 | 8.4 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.7 | 6.0 | 5.7 | 8.6 | 12.1 | 12.2 | 10.1 | 9.7 | 8.9 | 5.9 | 4.4 | 3.6 |
| Precipitation (mm) | 136 | 17 | 187 | 90 | 57 | 54 | 116 | 111 | 111 | 149 | 218 | 142 |
| Sunny days | 7 | 16 | 3 | 10 | 18 | 14 | 1 | 3 | 4 | 8 | 3 | 6 |
| Rainy days | 24 | 12 | 28 | 20 | 13 | 16 | 30 | 28 | 26 | 23 | 27 | 25 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Illien during the most sunny months:
Months with the longest average daylight duration in Illien:
The largest precipitation sum in Illien is at