Zonneschijn — 2026
| Month | Heiloo | Alkmaar | Difference |
|---|---|---|---|
| Jan | – | 110.8 uren | – |
| Feb | – | 134.6 uren | – |
| Mar | 21.2 uren | 156 uren | -134.8 |
| Apr | 36.1 uren | 33.9 uren | +2.2 |
| May | 424.2 uren | 426.9 uren | -2.7 |
| Jun | 426 uren | 429 uren | -3.0 |
| Jul | 440.8 uren | 441.5 uren | -0.7 |
| Aug |
| 392.2 uren |
| 394.6 uren |
| -2.4 |
| Sep | 308.2 uren | 309.6 uren | -1.4 |
| Oct | 233 uren | 232.7 uren | +0.3 |
| Nov | – | – | – |
| Dec | – | – | – |