Bewolking — 2026
| Month | Heerde | Zwolle | Difference |
|---|---|---|---|
| Jan | – | 83.1 % | – |
| Feb | – | 83.1 % | – |
| Mar | 66.3 % | 52.8 % | +13.5 |
| Apr | 78.8 % | 78.5 % | +0.3 |
| May | 60 % | 60 % | +0.0 |
| Jun | 63.4 % | 63.4 % | +0.0 |
| Jul | 54.6 % | 54.6 % | +0.0 |
| Aug |
| 55.3 % |
| 55.3 % |
| +0.0 |
| Sep | 69.3 % | 69.3 % | +0.0 |
| Oct | 69.9 % | 69.8 % | +0.1 |
| Nov | – | – | – |
| Dec | – | – | – |