Temperatuur — 2026
| Month | Leiderdorp | Leiden | Difference |
|---|---|---|---|
| Jan | – | 3.1 °C | – |
| Feb | – | 5.8 °C | – |
| Mar | 7.7 °C | 8.7 °C | -1.0 |
| Apr | 9.2 °C | 10.2 °C | -1.0 |
| 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 | 17.3 °C | 18 °C | -0.7 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |