Bewolking — 2023
| Month | Westerlo | Olen | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 86.6 % | 85.4 % | +1.2 |
| Apr | 67.7 % | 67.5 % | +0.2 |
| May | 61 % | 60.9 % | +0.1 |
| Jun | 41.6 % | 42.3 % | -0.7 |
| Jul | 63.7 % | 64.1 % | -0.4 |
| Aug |
| 62.9 % |
| 63 % |
| -0.1 |
| Sep | 57.8 % | 58.1 % | -0.3 |
| Oct | 76.6 % | 76.8 % | -0.2 |
| Nov | 74.3 % | 74.2 % | +0.1 |
| Dec | 84.2 % | 84.5 % | -0.3 |