Bewolking — 2026
| Maand | Midden-Delfland | Vlaardingen | Verschil |
|---|---|---|---|
| Jan | – | 79.8 % | – |
| Feb | – | 81.8 % | – |
| Mrt | 58.4 % | 57.9 % | +0.5 |
| Apr | 81.9 % | 80.5 % | +1.4 |
| Mei | 57.1 % | 57.1 % | +0.0 |
| Jun | 59.8 % | 59.8 % | +0.0 |
| Jul | 51.4 % | 51.2 % | +0.2 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |