Luchtvochtigheid — 2009
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 84.4 % | – | – |
| Feb | 86.8 % | – | – |
| Mar | 79.2 % | – | – |
| Apr | 78.2 % | – | – |
| May | 76.7 % | – | – |
| Jun | 74.8 % | – | – |
| Jul | 72.4 % | – | – |
| Aug | 68.2 % | – | – |
| Sep |
| 76.8 % |
| – |
| – |
| Oct | 80.3 % | – | – |
| Nov | 84.4 % | – | – |
| Dec | 88 % | – | – |