Temperatuur — 2026
| Month | Lisse | Hillegom | Difference |
|---|---|---|---|
| Jan | – | 2.9 °C | – |
| Feb | – | 5.7 °C | – |
| Mar | 8.4 °C | 8.2 °C | +0.2 |
| Apr | 9.9 °C | 9.6 °C | +0.3 |
| May | 13.8 °C | 13.8 °C | +0.0 |
| Jun | 18 °C | 18 °C | +0.0 |
| Jul | 19.3 °C | 19.3 °C | +0.0 |
| Aug |
| 19.3 °C |
| 19.3 °C |
| +0.0 |
| Sep | 17.7 °C | 17.6 °C | +0.1 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |