Zonneschijn — 2025
| Month | Hardinxveld-Giessendam | Altena | Difference |
|---|---|---|---|
| Jan | 100.3 uren | – | – |
| Feb | 145.4 uren | – | – |
| Mar | 306.9 uren | – | – |
| Apr | 325.3 uren | – | – |
| May | 382.5 uren | – | – |
| Jun | 390.2 uren | – | – |
| Jul | 391.2 uren | – | – |
| Aug | 339 uren | – | – |
| Sep |
| 271.1 uren |
| – |
| – |
| Oct | 148 uren | – | – |
| Nov | 116.6 uren | – | – |
| Dec | 100.1 uren | – | – |