Bewolking — 2023
| Month | Lontzen | Welkenraedt | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 88.7 % | 88.3 % | +0.4 |
| Apr | 69.6 % | 68.2 % | +1.4 |
| May | 65.4 % | 64.4 % | +1.0 |
| Jun | 43.8 % | 43.2 % | +0.6 |
| Jul | 65.7 % | 66.6 % | -0.9 |
| Aug |
| 60.2 % |
| 60.7 % |
| -0.5 |
| Sep | 57.2 % | 56.5 % | +0.7 |
| Oct | 77.8 % | 78.2 % | -0.4 |
| Nov | 84.4 % | 85.1 % | -0.7 |
| Dec | 89.5 % | 89.7 % | -0.2 |