Average annual temperature is 9.4 °C
Absolute maximum temperature: 31.5 °C
Absolute minimum temperature: -26.5 °C
Number of sunny days: 135 days
Number of rainy days: 211 days
Number of snow days: 19 days
Look at detailed online map of Westerlo
* Weather data for Westerlo 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) | 8.9 | 13.9 | 15.5 | 28.0 | 29.6 | 31.2 | 30.5 | 27.6 | 31.5 | 26.9 | 16.2 | 13.6 |
| Average daytime temperature (°C) | 3.1 | 4.2 | 5.9 | 15.6 | 20.1 | 23.1 | 27.0 | 24.1 | 21.5 | 16.7 | 7.1 | 5.0 |
| Average temperature (°C) | -0.2 | -1.4 | 0.7 | 9.2 | 13.5 | 17.5 | 21.4 | 19.2 | 16.8 | 11.7 | 2.3 | 1.3 |
| Average night temperature (°C) | -3.2 | -6.0 | -3.3 | 4.3 | 7.8 | 13.1 | 17.2 | 15.4 | 13.1 | 7.7 | -1.1 | -1.2 |
| Absolute minimum temperature (°C) | -8.2 | -26.5 | -9.1 | -4.1 | 1.5 | 7.8 | 12.8 | 10.1 | 6.3 | 0.3 | -6.2 | -8.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.4 | 14.6 | 15.2 | 14.9 | 13.9 | 12.5 | 11.1 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.3 | 6.2 | 7.0 | 8.8 | 11.9 | 10.6 | 11.4 | 10.3 | 8.2 | 7.0 | 6.8 | 3.9 |
| Precipitation (mm) | 116 | 55 | 125 | 117 | 49 | 110 | 198 | 141 | 132 | 132 | 58 | 176 |
| Sunny days | 8 | 12 | 11 | 12 | 18 | 5 | 1 | 6 | 12 | 15 | 20 | 15 |
| Rainy days | 17 | 11 | 15 | 18 | 13 | 25 | 30 | 25 | 18 | 16 | 9 | 14 |
| Snow days | 6 | 5 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Westerlo during the most sunny months:
The largest precipitation sum in Westerlo is at