Neerslag — 2026
| Month | Katwijk | Oegstgeest | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 6.2 mm | 7.8 mm | -1.6 |
| Apr | 3.4 mm | 3 mm | +0.4 |
| 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 |
| 80.8 mm |
| 80.8 mm |
| +0.0 |
| Sep | 42 mm | 43.8 mm | -1.8 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |