Wind — 1998
| Month | Ferrières | Hamoir | Difference |
|---|---|---|---|
| Jan | 19.7 km/h | – | – |
| Feb | 13 km/h | – | – |
| Mar | 16.9 km/h | – | – |
| Apr | 15.9 km/h | – | – |
| May | 12.1 km/h | – | – |
| Jun | 14.2 km/h | – | – |
| Jul | 14.7 km/h | – | – |
| Aug | 10.9 km/h | – | – |
| Sep |
| 16.7 km/h |
| – |
| – |
| Oct | 18.5 km/h | – | – |
| Nov | 14.5 km/h | – | – |
| Dec | 18.1 km/h | – | – |