Bewolking — 2020
| Month | Sluis | Vlissingen | Difference |
|---|---|---|---|
| Jan | 76.2 % | 76.2 % | +0.0 |
| Feb | 74.2 % | 74.4 % | -0.2 |
| Mar | 51.1 % | 51.4 % | -0.3 |
| Apr | 33.4 % | 33.1 % | +0.3 |
| May | 46.6 % | 45.5 % | +1.1 |
| Jun | 61.3 % | 60.6 % | +0.7 |
| Jul | 60 % | 58.7 % | +1.3 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |