Bewolking — 2026
| Month | Zwijndrecht | Alblasserdam | Difference |
|---|---|---|---|
| Jan | 76.7 % | – | – |
| Feb | 81.4 % | – | – |
| Mar | 55.2 % | 64.4 % | -9.2 |
| Apr | 58.5 % | 77.3 % | -18.8 |
| May | 59.2 % | 60 % | -0.8 |
| Jun | 62.2 % | 62.1 % | +0.1 |
| Jul | 43.9 % | 47.8 % | -3.9 |
| Aug |
| 54 % |
| 54.4 % |
| -0.4 |
| Sep | 70.7 % | 72.2 % | -1.5 |
| Oct | 62.6 % | 65.3 % | -2.7 |
| Nov | – | – | – |
| Dec | – | – | – |