Bewolking — 2020
| Month | Houffalize | Lierneux | Difference |
|---|---|---|---|
| Jan | 77.1 % | 77.1 % | +0.0 |
| Feb | 82.2 % | 82.2 % | +0.0 |
| Mar | 59.3 % | 59.3 % | +0.0 |
| Apr | 31.9 % | 31.9 % | +0.0 |
| May | 50.1 % | 50.1 % | +0.0 |
| Jun | 63.4 % | 63.4 % | +0.0 |
| Jul | 61.8 % | 61.8 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |