Bewolking — 2020
| Month | Schiermonnikoog | Noardeast-Fryslân | Difference |
|---|---|---|---|
| Jan | 82 % | 81.7 % | +0.3 |
| Feb | 72.6 % | 73.4 % | -0.8 |
| Mar | 51.5 % | 52.1 % | -0.6 |
| Apr | 44.8 % | 44 % | +0.8 |
| May | 49.3 % | 49.1 % | +0.2 |
| Jun | 66 % | 70.1 % | -4.1 |
| Jul | 61.6 % | 64.9 % | -3.3 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |