Bewolking — 2020
| Month | Manhay | Ferrières | Difference |
|---|---|---|---|
| Jan | 77.1 % | 73.1 % | +4.0 |
| Feb | 82.2 % | 80.8 % | +1.4 |
| Mar | 59.3 % | 58.3 % | +1.0 |
| Apr | 31.9 % | 33.9 % | -2.0 |
| May | 50.1 % | 49.9 % | +0.2 |
| Jun | 63.4 % | 63.4 % | +0.0 |
| Jul | 61.8 % | 62.5 % | -0.7 |
| Aug |
| – |
| 62 % |
| – |
| Sep | – | 56.6 % | – |
| Oct | – | 82.4 % | – |
| Nov | – | 62.5 % | – |
| Dec | – | 87.5 % | – |