Zonneschijn — 2025
| Month | Velsen | Haarlem | Difference |
|---|---|---|---|
| Jan | – | 101.2 uren | – |
| Feb | – | 144.9 uren | – |
| Mar | – | 308.9 uren | – |
| Apr | – | 319.6 uren | – |
| May | – | 380.6 uren | – |
| Jun | – | 408.6 uren | – |
| Jul | – | 405.1 uren | – |
| Aug | – | 348.2 uren | – |
| Sep |
| – |
| 275.2 uren |
| – |
| Oct | – | 167.3 uren | – |
| Nov | – | 128.6 uren | – |
| Dec | – | 98.3 uren | – |