Wind — 2023
| Month | La Hulpe | Lasne | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 19.7 km/h | 20.2 km/h | -0.5 |
| Apr | 14.5 km/h | 15 km/h | -0.5 |
| May | 13 km/h | 13.5 km/h | -0.5 |
| Jun | 12 km/h | 12.3 km/h | -0.3 |
| Jul | 16.5 km/h | 17 km/h | -0.5 |
| Aug |
| 13 km/h |
| 13.3 km/h |
| -0.3 |
| Sep | 12.1 km/h | 12.4 km/h | -0.3 |
| Oct | 17.6 km/h | 18 km/h | -0.4 |
| Nov | 20.8 km/h | 21.4 km/h | -0.6 |
| Dec | 21.5 km/h | 22 km/h | -0.5 |