Temperatuur — 2026
| Month | Maassluis | Midden-Delfland | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 7.8 °C | 7.5 °C | +0.3 |
| Apr | 9.4 °C | 9.1 °C | +0.3 |
| May | 14.4 °C | 14.4 °C | +0.0 |
| Jun | 18.4 °C | 18.4 °C | +0.0 |
| Jul | 19.7 °C | 19.7 °C | +0.0 |
| Aug |
| 19.5 °C |
| 19.5 °C |
| +0.0 |
| Sep | 17.7 °C | 17.4 °C | +0.3 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |