Neerslag — 2026
| Maand | Katwijk | Wassenaar | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 6.2 mm | 3.5 mm | +2.7 |
| Apr | 3.4 mm | 3.4 mm | +0.0 |
| Mei | 39.4 mm | 37.7 mm | +1.7 |
| Jun | 73 mm | 71.1 mm | +1.9 |
| Jul | 14.6 mm | 16.5 mm | -1.9 |
| Aug |
| 80.8 mm |
| 100.7 mm |
| -19.9 |
| Sep | 45.3 mm | 49.7 mm | -4.4 |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |