Wind — 2004
| Month | Châtelet | Aiseau-Presles | Difference |
|---|---|---|---|
| Jan | 18.6 km/h | – | – |
| Feb | 16.2 km/h | – | – |
| Mar | 14.7 km/h | – | – |
| Apr | 13.8 km/h | – | – |
| May | 10.9 km/h | – | – |
| Jun | 13.1 km/h | – | – |
| Jul | 12.3 km/h | – | – |
| Aug | 13.8 km/h | – | – |
| Sep |
| 15.6 km/h |
| – |
| – |
| Oct | 17 km/h | – | – |
| Nov | 12.7 km/h | – | – |
| Dec | 12.7 km/h | – | – |