Bewolking — 2026
| Month | Simpelveld | Heerlen | Difference |
|---|---|---|---|
| Jan | – | 82.1 % | – |
| Feb | – | 79.2 % | – |
| Mar | 83.4 % | 50.3 % | +33.1 |
| Apr | 74.1 % | 72.6 % | +1.5 |
| May | 59 % | 59.4 % | -0.4 |
| Jun | 60.9 % | 61.6 % | -0.7 |
| Jul | 46.8 % | 48.7 % | -1.9 |
| Aug |
| 54.2 % |
| 53.4 % |
| +0.8 |
| Sep | 66.4 % | 68.1 % | -1.7 |
| Oct | 60 % | 58.9 % | +1.1 |
| Nov | – | – | – |
| Dec | – | – | – |