Wind — 2009
| Month | Court-Saint-Étienne | Chastre | Difference |
|---|---|---|---|
| Jan | 14.9 km/h | – | – |
| Feb | 13.4 km/h | – | – |
| Mar | 15.4 km/h | – | – |
| Apr | 11 km/h | – | – |
| May | 13.2 km/h | – | – |
| Jun | 11.8 km/h | – | – |
| Jul | 13.9 km/h | – | – |
| Aug | 11.3 km/h | – | – |
| Sep |
| 13.3 km/h |
| – |
| – |
| Oct | 13.9 km/h | – | – |
| Nov | 21.9 km/h | – | – |
| Dec | 16.4 km/h | – | – |