Bewolking — 2026
| Month | Maassluis | Vlaardingen | Difference |
|---|---|---|---|
| Jan | – | 79.8 % | – |
| Feb | – | 81.8 % | – |
| Mar | 60.1 % | 57.9 % | +2.2 |
| Apr | 80.7 % | 80.5 % | +0.2 |
| May | 57.1 % | 57.1 % | +0.0 |
| Jun | 59.8 % | 59.8 % | +0.0 |
| Jul | 47.8 % | 47.8 % | +0.0 |
| Aug |
| 53.1 % |
| 53.1 % |
| +0.0 |
| Sep | 72.1 % | 72.1 % | +0.0 |
| Oct | 64.7 % | 64.5 % | +0.2 |
| Nov | – | – | – |
| Dec | – | – | – |