Temperatuur — 2026
| Monat | Midden-Delfland | Vlaardingen | Unterschied |
|---|---|---|---|
| Jan | – | 3.2 °C | – |
| Feb | – | 6.1 °C | – |
| Mär | 7.5 °C | 8.9 °C | -1.4 |
| Apr | 9.1 °C | 10.2 °C | -1.1 |
| Mai | 14.4 °C | 14.4 °C | +0.0 |
| Jun | 18.4 °C | 18.4 °C | +0.0 |
| Jul | 19.4 °C | 19.8 °C | -0.4 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |