Neerslag — 2026
| Month | Schiedam | Vlaardingen | Difference |
|---|---|---|---|
| Jan | – | 96.9 mm | – |
| Feb | – | 63.3 mm | – |
| Mar | 6.9 mm | 35.5 mm | -28.6 |
| Apr | 2.4 mm | 2.7 mm | -0.3 |
| May | 51.3 mm | 39.8 mm | +11.5 |
| Jun | 74.9 mm | 72.7 mm | +2.2 |
| Jul | 14.7 mm | 13.9 mm | +0.8 |
| Aug |
| 60.4 mm |
| 62.7 mm |
| -2.3 |
| Sep | 70.5 mm | 79.8 mm | -9.3 |
| Oct | 94.1 mm | 97.9 mm | -3.8 |
| Nov | – | – | – |
| Dec | – | – | – |