Zonneschijn — 2026
| Month | Schiedam | Vlaardingen | Difference |
|---|---|---|---|
| Jan | – | 117.1 uren | – |
| Feb | – | 124.9 uren | – |
| Mar | 19.3 uren | 159.6 uren | -140.3 |
| Apr | 28.5 uren | 29.6 uren | -1.1 |
| May | 422 uren | 423.5 uren | -1.5 |
| Jun | 423.7 uren | 425 uren | -1.3 |
| Jul | 440.8 uren | 441.6 uren | -0.8 |
| Aug |
| 392.6 uren |
| 394.1 uren |
| -1.5 |
| Sep | 308.9 uren | 309.1 uren | -0.2 |
| Oct | 236.1 uren | 236.4 uren | -0.3 |
| Nov | – | – | – |
| Dec | – | – | – |