Bewolking — 2020
| Month | De Fryske Marren | Urk | Difference |
|---|---|---|---|
| Jan | 81.5 % | 80.8 % | +0.7 |
| Feb | 73.6 % | 73.7 % | -0.1 |
| Mar | 51.3 % | 51.5 % | -0.2 |
| Apr | 42.5 % | 41.2 % | +1.3 |
| May | 46.8 % | 45.4 % | +1.4 |
| Jun | 70 % | 67.7 % | +2.3 |
| Jul | 62.4 % | 62.8 % | -0.4 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |