Bewolking — 2023
| Maand | Ridderkerk | Zwijndrecht | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 100 % | 84.7 % | +15.3 |
| Apr | 68.1 % | 67.9 % | +0.2 |
| Mei | 62.3 % | 60.6 % | +1.7 |
| Jun | 43.4 % | 43.4 % | +0.0 |
| Jul | 64.1 % | 65.8 % | -1.7 |
| Aug |
| 60.3 % |
| 61.2 % |
| -0.9 |
| Sep | 62.2 % | 59.4 % | +2.8 |
| Okt | 81.8 % | 77.6 % | +4.2 |
| Nov | 76.8 % | 75.1 % | +1.7 |
| Dec | 83.9 % | 83.3 % | +0.6 |