Wind — 2026
| Month | Voorschoten | Leiden | Difference |
|---|---|---|---|
| Jan | – | 14.8 km/h | – |
| Feb | – | 16.2 km/h | – |
| Mar | 20 km/h | 14 km/h | +6.0 |
| Apr | 15.3 km/h | 17.2 km/h | -1.9 |
| May | 13.1 km/h | 16.1 km/h | -3.0 |
| Jun | 14.9 km/h | 18.1 km/h | -3.2 |
| Jul | 14.3 km/h | 17.8 km/h | -3.5 |
| Aug |
| 13.5 km/h |
| 16.5 km/h |
| -3.0 |
| Sep | 14.9 km/h | 18 km/h | -3.1 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |