Zonneschijn — 2026
| Month | Hardinxveld-Giessendam | Altena | Difference |
|---|---|---|---|
| Jan | 115.7 uren | – | – |
| Feb | 125.6 uren | – | – |
| Mar | 270.1 uren | 16.8 uren | +253.3 |
| Apr | 28.6 uren | 30.4 uren | -1.8 |
| May | 418.8 uren | 416.8 uren | +2.0 |
| Jun | 418.5 uren | 416 uren | +2.5 |
| Jul | 371.7 uren | 372.5 uren | -0.8 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |