Wind — 2026
| Month | Hardinxveld-Giessendam | Altena | Difference |
|---|---|---|---|
| Jan | 13.5 km/h | – | – |
| Feb | 15.2 km/h | – | – |
| Mar | 12.5 km/h | 20.9 km/h | -8.4 |
| Apr | 15.9 km/h | 16.2 km/h | -0.3 |
| May | 12.1 km/h | 11.8 km/h | +0.3 |
| Jun | 13.7 km/h | 13.3 km/h | +0.4 |
| Jul | 13.3 km/h | 13.2 km/h | +0.1 |
| Aug |
| 12.7 km/h |
| 12.6 km/h |
| +0.1 |
| Sep | 13.3 km/h | 13.1 km/h | +0.2 |
| Oct | 15.4 km/h | 15.1 km/h | +0.3 |
| Nov | – | – | – |
| Dec | – | – | – |