Luchtvochtigheid — 2026
| Month | Velsen | Heemskerk | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 80.8 % | 81.6 % | -0.8 |
| Apr | 79 % | 79.3 % | -0.3 |
| May | 78.6 % | 75.6 % | +3.0 |
| Jun | 81.7 % | 79.8 % | +1.9 |
| Jul | 79.6 % | 78.3 % | +1.3 |
| Aug |
| 74.8 % |
| 73.8 % |
| +1.0 |
| Sep | 76.1 % | 77 % | -0.9 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |