Neerslag — 2026
| Month | Leiden | Oegstgeest | Difference |
|---|---|---|---|
| Jan | 87.4 mm | – | – |
| Feb | 68.7 mm | – | – |
| Mar | 41.8 mm | 7.8 mm | +34.0 |
| Apr | 3.7 mm | 3 mm | +0.7 |
| May | 39.4 mm | 39.4 mm | +0.0 |
| Jun | 73 mm | 73 mm | +0.0 |
| Jul | 14.6 mm | 14.6 mm | +0.0 |
| Aug |
| 81 mm |
| 80.8 mm |
| +0.2 |
| Sep | 93.2 mm | 93.2 mm | +0.0 |
| Oct | 126.8 mm | 125 mm | +1.8 |
| Nov | – | – | – |
| Dec | – | – | – |