Wind — 2026
| Month | Leiden | Zoeterwoude | Difference |
|---|---|---|---|
| Jan | 14.8 km/h | – | – |
| Feb | 16.2 km/h | – | – |
| Mar | 14 km/h | 22.5 km/h | -8.5 |
| Apr | 17.2 km/h | 17 km/h | +0.2 |
| May | 16.1 km/h | 13.1 km/h | +3.0 |
| Jun | 18.1 km/h | 14.9 km/h | +3.2 |
| Jul | 17.8 km/h | 14.3 km/h | +3.5 |
| Aug |
| 16.5 km/h |
| 13.5 km/h |
| +3.0 |
| Sep | 18.3 km/h | 15.2 km/h | +3.1 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |