Wind — 2009
| Month | Daverdisse | Bièvre | Difference |
|---|---|---|---|
| Jan | 14.4 km/h | – | – |
| Feb | 13.5 km/h | – | – |
| Mar | 15.4 km/h | – | – |
| Apr | 11.6 km/h | – | – |
| May | 12 km/h | – | – |
| Jun | 12.2 km/h | – | – |
| Jul | 12.8 km/h | – | – |
| Aug | 9.8 km/h | – | – |
| Sep |
| 12.3 km/h |
| – |
| – |
| Oct | 13.8 km/h | – | – |
| Nov | 20.6 km/h | – | – |
| Dec | 16.4 km/h | – | – |