Neerslag — 2026
| Month | Ridderkerk | Zwijndrecht | Difference |
|---|---|---|---|
| Jan | 96.4 mm | 76.6 mm | +19.8 |
| Feb | 63.5 mm | 98.3 mm | -34.8 |
| Mar | 64.7 mm | 59.9 mm | +4.8 |
| Apr | 3.6 mm | 9.8 mm | -6.2 |
| 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 |
| 57.1 mm |
| 70 mm |
| -12.9 |
| Sep | 61.7 mm | 52.1 mm | +9.6 |
| Oct | 90.1 mm | 99.9 mm | -9.8 |
| Nov | – | – | – |
| Dec | – | – | – |