Neerslag — 2026
| Month | Heemstede | Hillegom | Difference |
|---|---|---|---|
| Jan | – | 91.6 mm | – |
| Feb | – | 62.5 mm | – |
| Mar | 1.6 mm | 52.2 mm | -50.6 |
| Apr | 8.5 mm | 5.1 mm | +3.4 |
| May | 39.4 mm | 39.4 mm | +0.0 |
| Jun | 73 mm | 73 mm | +0.0 |
| Jul | 13.8 mm | 12.9 mm | +0.9 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |