Bewolking — 2020
| Month | Zwartewaterland | Zwolle | Difference |
|---|---|---|---|
| Jan | 80.7 % | 80.7 % | +0.0 |
| Feb | 75.2 % | 75.2 % | +0.0 |
| Mar | 53.9 % | 53.9 % | +0.0 |
| Apr | 40.7 % | 40.7 % | +0.0 |
| May | 49 % | 49 % | +0.0 |
| Jun | 70.3 % | 70.3 % | +0.0 |
| Jul | 64.9 % | 64.9 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |