Bewolking — 2026
| Month | Beverwijk | Heemskerk | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 53.4 % | 53.4 % | +0.0 |
| Apr | 79.3 % | 79.4 % | -0.1 |
| May | 57.7 % | 57.7 % | +0.0 |
| Jun | 59.8 % | 59.8 % | +0.0 |
| Jul | 51.9 % | 51.9 % | +0.0 |
| Aug |
| 51.5 % |
| 51.5 % |
| +0.0 |
| Sep | 68.6 % | 69 % | -0.4 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |