Wind — 2009
| Month | Lierde | Zottegem | Difference |
|---|---|---|---|
| Jan | 14 km/h | – | – |
| Feb | 12.3 km/h | – | – |
| Mar | 14.3 km/h | – | – |
| Apr | 10.9 km/h | – | – |
| May | 13 km/h | – | – |
| Jun | 11.3 km/h | – | – |
| Jul | 13.3 km/h | – | – |
| Aug | 11.1 km/h | – | – |
| Sep |
| 12.8 km/h |
| – |
| – |
| Oct | 12.9 km/h | – | – |
| Nov | 20.5 km/h | – | – |
| Dec | 15.3 km/h | – | – |