Neerslag — 2026
| Month | Zwijndrecht | Alblasserdam | Difference |
|---|---|---|---|
| Jan | 76.6 mm | – | – |
| Feb | 98.3 mm | – | – |
| Mar | 59.9 mm | 12.4 mm | +47.5 |
| Apr | 9.8 mm | 3.3 mm | +6.5 |
| May | 94 mm | 67.6 mm | +26.4 |
| Jun | 81.1 mm | 69.8 mm | +11.3 |
| Jul | 13.4 mm | 14.9 mm | -1.5 |
| Aug |
| 70 mm |
| 58.1 mm |
| +11.9 |
| Sep | 52.1 mm | 53.8 mm | -1.7 |
| Oct | 87.1 mm | 85.4 mm | +1.7 |
| Nov | 0.4 mm | 0.1 mm | +0.3 |
| Dec | – | – | – |