Neerslag — 2026
| Maand | Heemskerk | Velsen | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 1.3 mm | 0.7 mm | +0.6 |
| Apr | 2.9 mm | 3.2 mm | -0.3 |
| Mei | 49.5 mm | 41.4 mm | +8.1 |
| Jun | 101.1 mm | 77 mm | +24.1 |
| Jul | 14.4 mm | 17.7 mm | -3.3 |
| Aug |
| 93.8 mm |
| 110 mm |
| -16.2 |
| Sep | 56.2 mm | 50.6 mm | +5.6 |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |