Wind — 1999
| Month | Court-Saint-Étienne | Ottignies-Louvain-la-Neuve | Difference |
|---|---|---|---|
| Jan | 19.7 km/h | – | – |
| Feb | 16.5 km/h | – | – |
| Mar | 14.7 km/h | – | – |
| Apr | 14.4 km/h | – | – |
| May | 12.9 km/h | – | – |
| Jun | 13.1 km/h | – | – |
| Jul | 12.6 km/h | – | – |
| Aug | 11.8 km/h | – | – |
| Sep | 14.1 km/h | – | – |
| Oct | 16.4 km/h | – | – |
| Nov | 16.2 km/h | – | – |
| Dec | 21 km/h | – | – |