Neerslag — 2026
| Month | Leiderdorp | Zoeterwoude | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 8.3 mm | 5.6 mm | +2.7 |
| Apr | 4.2 mm | 3.4 mm | +0.8 |
| May | 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 |
| 81 mm |
| 60.4 mm |
| +20.6 |
| Sep | 93.1 mm | 70.4 mm | +22.7 |
| Oct | 128.4 mm | 93.1 mm | +35.3 |
| Nov | – | – | – |
| Dec | – | – | – |