Neerslag — 2026
| Month | Barendrecht | Rotterdam | Difference |
|---|---|---|---|
| Jan | – | 84 mm | – |
| Feb | – | 59 mm | – |
| Mar | 9.2 mm | 31.9 mm | -22.7 |
| Apr | 2.8 mm | 3.3 mm | -0.5 |
| May | 67.4 mm | 51.3 mm | +16.1 |
| Jun | 79.3 mm | 74.9 mm | +4.4 |
| Jul | 14.3 mm | 14.7 mm | -0.4 |
| Aug |
| 56.9 mm |
| 60.6 mm |
| -3.7 |
| Sep | 61.5 mm | 70.5 mm | -9.0 |
| Oct | 90.4 mm | 93.4 mm | -3.0 |
| Nov | – | – | – |
| Dec | – | – | – |