Neerslag — 2026
| Month | Barendrecht | Zwijndrecht | Difference |
|---|---|---|---|
| Jan | – | 76.6 mm | – |
| Feb | – | 98.3 mm | – |
| Mar | 9.2 mm | 59.9 mm | -50.7 |
| Apr | 2.8 mm | 9.8 mm | -7.0 |
| May | 67.4 mm | 94 mm | -26.6 |
| Jun | 79.3 mm | 81.1 mm | -1.8 |
| Jul | 14.3 mm | 13.4 mm | +0.9 |
| Aug |
| 56.9 mm |
| 70 mm |
| -13.1 |
| Sep | 61.5 mm | 52.1 mm | +9.4 |
| Oct | 90.4 mm | 99.9 mm | -9.5 |
| Nov | – | – | – |
| Dec | – | – | – |