Neerslag — 2020
| Month | Beverwijk | Velsen | Difference |
|---|---|---|---|
| Jan | 65 mm | 86.5 mm | -21.5 |
| Feb | 131.9 mm | 147.4 mm | -15.5 |
| Mar | 48.9 mm | 46.6 mm | +2.3 |
| Apr | 24.6 mm | 24.6 mm | +0.0 |
| May | 18.9 mm | 22.9 mm | -4.0 |
| Jun | 68.7 mm | 70.8 mm | -2.1 |
| Jul | 76.8 mm | 88.2 mm | -11.4 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |