Neerslag — 2026
| Month | Schiedam | Midden-Delfland | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 6.9 mm | 4.7 mm | +2.2 |
| Apr | 2.4 mm | 2.7 mm | -0.3 |
| May | 51.3 mm | 39.8 mm | +11.5 |
| Jun | 74.9 mm | 72.8 mm | +2.1 |
| Jul | 14.7 mm | 13.9 mm | +0.8 |
| Aug |
| 60.4 mm |
| 62.5 mm |
| -2.1 |
| Sep | 64.6 mm | 63.9 mm | +0.7 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |