Bewolking — 2026
| Month | Zwijndrecht | Ridderkerk | Difference |
|---|---|---|---|
| Jan | 76.7 % | 78.3 % | -1.6 |
| Feb | 81.4 % | 81.5 % | -0.1 |
| Mar | 55.2 % | 53.1 % | +2.1 |
| Apr | 58.5 % | 78.6 % | -20.1 |
| May | 59.2 % | 59 % | +0.2 |
| Jun | 62.2 % | 61.6 % | +0.6 |
| Jul | 43.9 % | 47.4 % | -3.5 |
| Aug |
| 54 % |
| 54.3 % |
| -0.3 |
| Sep | 72.3 % | 73.7 % | -1.4 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |