Wind — 2020
| Month | Olen | Herselt | Difference |
|---|---|---|---|
| Jan | 15.6 km/h | 15.8 km/h | -0.2 |
| Feb | 22.7 km/h | 23.1 km/h | -0.4 |
| Mar | 16.7 km/h | 16.7 km/h | +0.0 |
| Apr | 12.1 km/h | 11.8 km/h | +0.3 |
| May | 12.5 km/h | 12.2 km/h | +0.3 |
| Jun | 11.9 km/h | 11.9 km/h | +0.0 |
| Jul | 12.4 km/h | 12.2 km/h | +0.2 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |