Bewolking — 2020
| Month | Zemst | Vilvoorde | Difference |
|---|---|---|---|
| Jan | 74.7 % | 74.7 % | +0.0 |
| Feb | 75.1 % | 75.1 % | +0.0 |
| Mar | 53.4 % | 53.4 % | +0.0 |
| Apr | 33.4 % | 33.4 % | +0.0 |
| May | 48.3 % | 48.3 % | +0.0 |
| Jun | 63.6 % | 63.6 % | +0.0 |
| Jul | 62.1 % | 62.1 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |