Bewolking — 2020
| Month | Attert | Arlon | Difference |
|---|---|---|---|
| Jan | 77.8 % | 77.8 % | +0.0 |
| Feb | 81.4 % | 81.4 % | +0.0 |
| Mar | 57.5 % | 57.5 % | +0.0 |
| Apr | 29.8 % | 29.8 % | +0.0 |
| May | 50.1 % | 50.1 % | +0.0 |
| Jun | 62.8 % | 62.8 % | +0.0 |
| Jul | 61.5 % | 61.5 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |