Bewolking — 2003
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 68.7 % | – | – |
| Feb | 42.5 % | – | – |
| Mar | 46.9 % | – | – |
| Apr | 55.9 % | – | – |
| May | 65 % | – | – |
| Jun | 62.4 % | – | – |
| Jul | 55.8 % | – | – |
| Aug | 47.1 % | – | – |
| Sep |
| 44.6 % |
| – |
| – |
| Oct | 71.3 % | – | – |
| Nov | 72.7 % | – | – |
| Dec | 70.9 % | – | – |