Neerslag — 2026
| Month | Wassenaar | Voorschoten | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 3.5 mm | 3.6 mm | -0.1 |
| Apr | 3.4 mm | 3.7 mm | -0.3 |
| May | 37.7 mm | 51.3 mm | -13.6 |
| Jun | 71.1 mm | 74.9 mm | -3.8 |
| Jul | 16.5 mm | 14.7 mm | +1.8 |
| Aug |
| 100.7 mm |
| 60.3 mm |
| +40.4 |
| Sep | 110.6 mm | 70.3 mm | +40.3 |
| Oct | 139.3 mm | 93.3 mm | +46.0 |
| Nov | – | – | – |
| Dec | – | – | – |