Luchtvochtigheid — 2025
| Month | Alphen aan den Rijn | Kaag en Braassem | Difference |
|---|---|---|---|
| Jan | 88.3 % | – | – |
| Feb | 83.8 % | – | – |
| Mar | 78.7 % | – | – |
| Apr | 76.5 % | – | – |
| May | 68.6 % | – | – |
| Jun | 73 % | – | – |
| Jul | 76.4 % | – | – |
| Aug | 73.7 % | – | – |
| Sep |
| 78.4 % |
| – |
| – |
| Oct | 82.8 % | – | – |
| Nov | 87.5 % | – | – |
| Dec | 86.7 % | – | – |