Bewolking — 2026
| Monat | Alkmaar | Heiloo | Unterschied |
|---|---|---|---|
| Jan | 83.1 % | – | – |
| Feb | 78.5 % | – | – |
| Mär | 58.8 % | 51.2 % | +7.6 |
| Apr | 80.7 % | 79.9 % | +0.8 |
| Mai | 55.8 % | 57.7 % | -1.9 |
| Jun | 59.4 % | 59.8 % | -0.4 |
| Jul | 53.8 % | 51.9 % | +1.9 |
| Aug |
| 50.3 % |
| 51.5 % |
| -1.2 |
| Sep | 71.5 % | 73 % | -1.5 |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |