Bewolking — 2011
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 75.3 % | – | – |
| Feb | 81.6 % | – | – |
| Mar | 49.9 % | – | – |
| Apr | 51.6 % | – | – |
| May | 60.4 % | – | – |
| Jun | 64.7 % | – | – |
| Jul | 69.9 % | – | – |
| Aug | 68.7 % | – | – |
| Sep |
| 56.7 % |
| – |
| – |
| Oct | 53.7 % | – | – |
| Nov | 61.3 % | – | – |
| Dec | 79.3 % | – | – |