Wind — 2020
| Month | Halen | Herk-de-Stad | Difference |
|---|---|---|---|
| Jan | 15.9 km/h | 15.4 km/h | +0.5 |
| Feb | 23.1 km/h | 22.5 km/h | +0.6 |
| Mar | 16.8 km/h | 16.2 km/h | +0.6 |
| Apr | 11.8 km/h | 11.5 km/h | +0.3 |
| May | 12.1 km/h | 11.8 km/h | +0.3 |
| Jun | 11.8 km/h | 11.4 km/h | +0.4 |
| Jul | 12.1 km/h | 11.7 km/h | +0.4 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |