Neerslag — 2026
| Month | Velsen | Haarlem | Difference |
|---|---|---|---|
| Jan | – | 90.4 mm | – |
| Feb | – | 79.8 mm | – |
| Mar | 0.7 mm | 36.6 mm | -35.9 |
| Apr | 3.2 mm | 4.3 mm | -1.1 |
| May | 41.4 mm | 49.5 mm | -8.1 |
| Jun | 77 mm | 100.9 mm | -23.9 |
| Jul | 17.7 mm | 14.4 mm | +3.3 |
| Aug |
| 110 mm |
| 94 mm |
| +16.0 |
| Sep | 113.4 mm | 90.5 mm | +22.9 |
| Oct | 164.4 mm | 130.9 mm | +33.5 |
| Nov | – | – | – |
| Dec | – | – | – |