Average annual temperature is 17.5 °C
Absolute maximum temperature: 41.7 °C
Absolute minimum temperature: -9.0 °C
Number of sunny days: 259 days
Number of rainy days: 104 days
Number of snow days: 2 days
Look at detailed online map of Idalou
* Weather data for Idalou United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 23.1 | 26.0 | 29.1 | 32.0 | 33.9 | 41.7 | 40.9 | 40.6 | 39.0 | 31.1 | 29.8 | 23.6 |
| Average daytime temperature (°C) | 13.8 | 15.9 | 20.7 | 24.7 | 28.1 | 32.9 | 35.8 | 37.0 | 32.2 | 23.9 | 17.8 | 14.7 |
| Average temperature (°C) | 6.7 | 7.3 | 12.0 | 16.1 | 20.9 | 25.4 | 29.2 | 30.3 | 25.5 | 17.2 | 10.7 | 7.6 |
| Average night temperature (°C) | 1.3 | 1.6 | 5.1 | 9.4 | 14.7 | 19.1 | 23.1 | 23.9 | 19.5 | 11.6 | 5.4 | 2.4 |
| Absolute minimum temperature (°C) | -9.0 | -7.5 | -2.0 | 3.2 | 9.9 | 13.3 | 18.5 | 18.8 | 14.7 | -1.6 | -3.4 | -3.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 7.9 | 10.0 | 10.7 | 11.2 | 12.1 | 12.7 | 12.0 | 10.7 | 9.0 | 7.9 | 7.9 |
| Precipitation (mm) | 13 | 6 | 3 | 10 | 87 | 47 | 20 | 4 | 32 | 50 | 9 | 48 |
| Sunny days | 25 | 21 | 24 | 23 | 10 | 16 | 21 | 28 | 21 | 21 | 25 | 24 |
| Rainy days | 5 | 6 | 7 | 7 | 21 | 14 | 10 | 3 | 9 | 10 | 5 | 7 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Idalou during the most sunny months:
The largest precipitation sum in Idalou is at