Bewolking — 2020
| Month | Heiloo | Bergen (NH) | Difference |
|---|---|---|---|
| Jan | 79.5 % | 80.1 % | -0.6 |
| Feb | 73.8 % | 73.9 % | -0.1 |
| Mar | 52.2 % | 50.6 % | +1.6 |
| Apr | 40 % | 42.5 % | -2.5 |
| May | 44.8 % | 45 % | -0.2 |
| Jun | 66.1 % | 66.1 % | +0.0 |
| Jul | 61.8 % | 62.2 % | -0.4 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |