Bewolking — 2026
| Month | Wassenaar | Katwijk | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 53.7 % | 52.8 % | +0.9 |
| Apr | 79.3 % | 78.4 % | +0.9 |
| May | 55.5 % | 57.7 % | -2.2 |
| Jun | 58.1 % | 59.4 % | -1.3 |
| Jul | 48.5 % | 49.8 % | -1.3 |
| Aug |
| 50.7 % |
| 52.1 % |
| -1.4 |
| Sep | 72.3 % | 72.8 % | -0.5 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |