Wind — 2020
| Month | Alphen aan den Rijn | Leiderdorp | Difference |
|---|---|---|---|
| Jan | 17.5 km/h | 24.1 km/h | -6.6 |
| Feb | 24.7 km/h | 32.6 km/h | -7.9 |
| Mar | 18.1 km/h | 24 km/h | -5.9 |
| Apr | 13.1 km/h | 16.8 km/h | -3.7 |
| May | 13.5 km/h | 17.6 km/h | -4.1 |
| Jun | 13.3 km/h | 17.5 km/h | -4.2 |
| Jul | 13.7 km/h | 18.2 km/h | -4.5 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |