Zonneschijn — 2023
| Month | Heemstede | Haarlem | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | – | 86.2 uren | – |
| Apr | – | 264.9 uren | – |
| May | – | 360.4 uren | – |
| Jun | – | 391.1 uren | – |
| Jul | – | 368.5 uren | – |
| Aug | – | 335.2 uren | – |
| Sep |
| – |
| 281.3 uren |
| – |
| Oct | – | 166.8 uren | – |
| Nov | – | 115.9 uren | – |
| Dec | – | 80.2 uren | – |