Zonneschijn — 2026
| Month | Maassluis | Nissewaard | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 19.7 uren | 20.8 uren | -1.1 |
| Apr | 30 uren | 31.3 uren | -1.3 |
| May | 423.5 uren | 421.2 uren | +2.3 |
| Jun | 425.1 uren | 422 uren | +3.1 |
| Jul | 441.6 uren | 440.4 uren | +1.2 |
| Aug |
| 394.1 uren |
| 393 uren |
| +1.1 |
| Sep | 309.1 uren | 307.3 uren | +1.8 |
| Oct | 233.9 uren | 234.5 uren | -0.6 |
| Nov | – | – | – |
| Dec | – | – | – |