Bewolking — 2025
| Maand | Ridderkerk | Zwijndrecht | Verschil |
|---|---|---|---|
| Jan | 79.7 % | 79 % | +0.7 |
| Feb | 72.3 % | 70.1 % | +2.2 |
| Mrt | 40.8 % | 39 % | +1.8 |
| Apr | 44.6 % | 46.5 % | -1.9 |
| Mei | 48.2 % | 52.2 % | -4.0 |
| Jun | 49.2 % | 51.3 % | -2.1 |
| Jul | 56.9 % | 54.2 % | +2.7 |
| Aug |
| 57.9 % |
| 55.9 % |
| +2.0 |
| Sep | 60.8 % | 59.9 % | +0.9 |
| Okt | 85.7 % | 83.9 % | +1.8 |
| Nov | 76.3 % | 76.4 % | -0.1 |
| Dec | 75.7 % | 73.5 % | +2.2 |