Bewolking — 2001
| Month | Court-Saint-Étienne | Ottignies-Louvain-la-Neuve | Difference |
|---|---|---|---|
| Jan | 67.7 % | – | – |
| Feb | 80.3 % | – | – |
| Mar | 86.6 % | – | – |
| Apr | 77.4 % | – | – |
| May | 55.6 % | – | – |
| Jun | 66.8 % | – | – |
| Jul | 65 % | – | – |
| Aug | 62.3 % | – | – |
| Sep |
| 80.1 % |
| – |
| – |
| Oct | 73.6 % | – | – |
| Nov | 76 % | – | – |
| Dec | 64.8 % | – | – |