Zonneschijn — 2020
| Month | Heemstede | Haarlem | Difference |
|---|---|---|---|
| Jan | 147.4 uren | 145.4 uren | +2.0 |
| Feb | 185.3 uren | 184.7 uren | +0.6 |
| Mar | 303.5 uren | 304.3 uren | -0.8 |
| Apr | 367.2 uren | 367.6 uren | -0.4 |
| May | 430.2 uren | 430.9 uren | -0.7 |
| Jun | 426.2 uren | 426.9 uren | -0.7 |
| Jul | 417.4 uren | 414.5 uren | +2.9 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |