Bewolking — 2020
| Month | Seraing | Grâce-Hollogne | Difference |
|---|---|---|---|
| Jan | 71.5 % | 71.1 % | +0.4 |
| Feb | 80.4 % | 77.6 % | +2.8 |
| Mar | 57.6 % | 55.9 % | +1.7 |
| Apr | 31.7 % | 32.8 % | -1.1 |
| May | 49.8 % | 48.7 % | +1.1 |
| Jun | 62.9 % | 62.8 % | +0.1 |
| Jul | 62.7 % | 61.2 % | +1.5 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |