Neerslag — 2026
| Maand | Castricum | Heiloo | Verschil |
|---|---|---|---|
| Jan | 90.3 mm | – | – |
| Feb | 60.3 mm | – | – |
| Mrt | 60.4 mm | 5.6 mm | +54.8 |
| Apr | 3.5 mm | 2.3 mm | +1.2 |
| Mei | 49.5 mm | 49.5 mm | +0.0 |
| Jun | 100.9 mm | 100.9 mm | +0.0 |
| Jul | 14 mm | 15.7 mm | -1.7 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |