Zonneschijn — 2026
| Month | Castricum | Heemskerk | Difference |
|---|---|---|---|
| Jan | 108.3 uren | – | – |
| Feb | 133.9 uren | – | – |
| Mar | 265.7 uren | 22.8 uren | +242.9 |
| Apr | 37.1 uren | 38 uren | -0.9 |
| May | 424.2 uren | 424.2 uren | +0.0 |
| Jun | 426.1 uren | 426 uren | +0.1 |
| Jul | 368.6 uren | 368.8 uren | -0.2 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |