Temperatuur — 2026
| Maand | Maassluis | Nissewaard | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 7.8 °C | 7.3 °C | +0.5 |
| Apr | 9.4 °C | 9 °C | +0.4 |
| Mei | 14.4 °C | 15 °C | -0.6 |
| Jun | 18.4 °C | 19 °C | -0.6 |
| Jul | 19.7 °C | 20.3 °C | -0.6 |
| Aug |
| 19.5 °C |
| 19.7 °C |
| -0.2 |
| Sep | 17.6 °C | 17.2 °C | +0.4 |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |