Bewolking — 2020
| Month | Hollands Kroon | Den Helder | Difference |
|---|---|---|---|
| Jan | 80.3 % | 80.1 % | +0.2 |
| Feb | 72.8 % | 73.1 % | -0.3 |
| Mar | 48.7 % | 48.3 % | +0.4 |
| Apr | 44.7 % | 45.1 % | -0.4 |
| May | 44.6 % | 44.2 % | +0.4 |
| Jun | 66.1 % | 65 % | +1.1 |
| Jul | 61.8 % | 61.5 % | +0.3 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |