Wind — 2020
| Month | Katwijk | Voorschoten | Difference |
|---|---|---|---|
| Jan | 24.1 km/h | 19.1 km/h | +5.0 |
| Feb | 32.6 km/h | 26.8 km/h | +5.8 |
| Mar | 24 km/h | 19.5 km/h | +4.5 |
| Apr | 16.8 km/h | 13.9 km/h | +2.9 |
| May | 17.6 km/h | 14.5 km/h | +3.1 |
| Jun | 17.5 km/h | 14.4 km/h | +3.1 |
| Jul | 18.2 km/h | 14.8 km/h | +3.4 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |