Bewolking — 2015
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 77.3 % | – | – |
| Feb | 66 % | – | – |
| Mar | 62.6 % | – | – |
| Apr | 53.3 % | – | – |
| May | 68.3 % | – | – |
| Jun | 60.3 % | – | – |
| Jul | 58.7 % | – | – |
| Aug | 65.1 % | – | – |
| Sep |
| 57.9 % |
| – |
| – |
| Oct | 75.4 % | – | – |
| Nov | 72.5 % | – | – |
| Dec | 76.1 % | – | – |