Wind — 2004
| Month | Ferrières | Hamoir | Difference |
|---|---|---|---|
| Jan | 18.6 km/h | – | – |
| Feb | 15.7 km/h | – | – |
| Mar | 14.6 km/h | – | – |
| Apr | 14.5 km/h | – | – |
| May | 11 km/h | – | – |
| Jun | 12.8 km/h | – | – |
| Jul | 12 km/h | – | – |
| Aug | 14 km/h | – | – |
| Sep |
| 15 km/h |
| – |
| – |
| Oct | 16.9 km/h | – | – |
| Nov | 12.7 km/h | – | – |
| Dec | 12.9 km/h | – | – |