Bewolking — 2021
| Month | Mont-Saint-Guibert | Court-Saint-Étienne | Difference |
|---|---|---|---|
| Jan | – | 89.6 % | – |
| Feb | – | 66.1 % | – |
| Mar | – | 60.1 % | – |
| Apr | – | 52.5 % | – |
| May | – | 62.9 % | – |
| Jun | – | 64.9 % | – |
| Jul | – | 63.5 % | – |
| Aug | – | 67.5 % | – |
| Sep |
| – |
| 59 % |
| – |
| Oct | – | 67.5 % | – |
| Nov | – | 76.1 % | – |
| Dec | – | 85.3 % | – |