Bewolking — 2020
| Month | Heerde | Olst-Wijhe | Difference |
|---|---|---|---|
| Jan | 80.7 % | 80.5 % | +0.2 |
| Feb | 75.2 % | 76.4 % | -1.2 |
| Mar | 53.9 % | 54.6 % | -0.7 |
| Apr | 40.7 % | 39 % | +1.7 |
| May | 49 % | 50.8 % | -1.8 |
| Jun | 70.3 % | 70.2 % | +0.1 |
| Jul | 64.9 % | 65.7 % | -0.8 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |