Zonneschijn — 2023
| Monat | Vlaardingen | Maassluis | Unterschied |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mär | 83.6 uren | – | – |
| Apr | 254.1 uren | – | – |
| Mai | 361.9 uren | – | – |
| Jun | 403.6 uren | – | – |
| Jul | 366.4 uren | – | – |
| Aug | 340.9 uren | – | – |
| Sep |
| 279.9 uren |
| – |
| – |
| Okt | 186.4 uren | – | – |
| Nov | 122.3 uren | – | – |
| Dez | 79.8 uren | – | – |