Bewolking — 2026
| Month | Barendrecht | Zwijndrecht | Difference |
|---|---|---|---|
| Jan | – | 76.7 % | – |
| Feb | – | 81.4 % | – |
| Mar | 63.2 % | 55.2 % | +8.0 |
| Apr | 78.7 % | 58.5 % | +20.2 |
| May | 59 % | 59.2 % | -0.2 |
| Jun | 61.6 % | 62.2 % | -0.6 |
| Jul | 47.4 % | 43.9 % | +3.5 |
| Aug |
| 54.3 % |
| 54 % |
| +0.3 |
| Sep | 72.6 % | 70.7 % | +1.9 |
| Oct | 65.3 % | 62.1 % | +3.2 |
| Nov | – | – | – |
| Dec | – | – | – |