Bewolking — 2020
| Month | Zuidplas | Capelle aan den IJssel | Difference |
|---|---|---|---|
| Jan | 77.9 % | 77.9 % | +0.0 |
| Feb | 73.8 % | 73.8 % | +0.0 |
| Mar | 53.2 % | 53.2 % | +0.0 |
| Apr | 37.7 % | 37.7 % | +0.0 |
| May | 46.5 % | 46.5 % | +0.0 |
| Jun | 65.7 % | 65.7 % | +0.0 |
| Jul | 62 % | 62 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |