Neerslag — 2026
| Maand | Katwijk | Voorschoten | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 6.2 mm | 3.6 mm | +2.6 |
| Apr | 3.4 mm | 3.7 mm | -0.3 |
| Mei | 39.4 mm | 51.3 mm | -11.9 |
| Jun | 73 mm | 74.9 mm | -1.9 |
| Jul | 14.6 mm | 14.7 mm | -0.1 |
| Aug |
| 80.8 mm |
| 60.3 mm |
| +20.5 |
| Sep | 92.9 mm | 70.3 mm | +22.6 |
| Okt | 124.6 mm | 93.3 mm | +31.3 |
| Nov | – | – | – |
| Dec | – | – | – |