Zonneschijn — 2020
| Month | Voorne aan Zee | Maassluis | Difference |
|---|---|---|---|
| Jan | 146.8 uren | 147.4 uren | -0.6 |
| Feb | 184.9 uren | 185.3 uren | -0.4 |
| Mar | 299.9 uren | 301.6 uren | -1.7 |
| Apr | 366.7 uren | 367.3 uren | -0.6 |
| May | 428.1 uren | 429.6 uren | -1.5 |
| Jun | 421.8 uren | 423.3 uren | -1.5 |
| Jul | 418.2 uren | 419.5 uren | -1.3 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |