Bewolking — 2023
| Month | Bouillon | Bièvre | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 90.2 % | 91.7 % | -1.5 |
| Apr | 69.3 % | 70.3 % | -1.0 |
| May | 59.9 % | 62.3 % | -2.4 |
| Jun | 40.1 % | 40.8 % | -0.7 |
| Jul | 61.4 % | 63.7 % | -2.3 |
| Aug |
| 58.7 % |
| 60 % |
| -1.3 |
| Sep | 53.2 % | 54.1 % | -0.9 |
| Oct | 77.2 % | 76.9 % | +0.3 |
| Nov | 89.1 % | 90.7 % | -1.6 |
| Dec | 94.8 % | 95.3 % | -0.5 |