Temperatuur — 2026
| Maand | Westland | Midden-Delfland | Verschil |
|---|---|---|---|
| Jan | 3.1 °C | – | – |
| Feb | 5.9 °C | – | – |
| Mrt | 8.6 °C | 7.5 °C | +1.1 |
| Apr | 9.7 °C | 9.1 °C | +0.6 |
| Mei | 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 | 18 °C | 17.6 °C | +0.4 |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |