Neerslag — 2020
| Maand | Maassluis | Nissewaard | Verschil |
|---|---|---|---|
| Jan | 56 mm | 47 mm | +9.0 |
| Feb | 113.8 mm | 114.8 mm | -1.0 |
| Mrt | 43.8 mm | 49.4 mm | -5.6 |
| Apr | 26.4 mm | 25.6 mm | +0.8 |
| Mei | 10.6 mm | 11.3 mm | -0.7 |
| Jun | 64.3 mm | 72.3 mm | -8.0 |
| Jul | 59.6 mm | 61.7 mm | -2.1 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |