Temperatuur — 2026
| Mois | Westland | Midden-Delfland | Différence |
|---|---|---|---|
| Jan | 3.1 °C | – | – |
| Fév | 5.9 °C | – | – |
| Mar | 8.6 °C | 7.5 °C | +1.1 |
| Avr | 9.7 °C | 9.1 °C | +0.6 |
| Mai | 14.4 °C | 14.4 °C | +0.0 |
| Juin | 18.4 °C | 18.4 °C | +0.0 |
| Juil | 19.9 °C | 19.7 °C | +0.2 |
| Aoû |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Déc | – | – | – |