Zonneschijn — 2026
| Month | Hardinxveld-Giessendam | Sliedrecht | Difference |
|---|---|---|---|
| Jan | 115.7 uren | – | – |
| Feb | 125.6 uren | – | – |
| Mar | 270.1 uren | 12.9 uren | +257.2 |
| Apr | 28.6 uren | 28.8 uren | -0.2 |
| May | 418.8 uren | 418.8 uren | +0.0 |
| Jun | 418.5 uren | 418.5 uren | +0.0 |
| Jul | 438.1 uren | 438.1 uren | +0.0 |
| Aug |
| 389.4 uren |
| 389.4 uren |
| +0.0 |
| Sep | 305.6 uren | 305.6 uren | +0.0 |
| Oct | 237.2 uren | 237.9 uren | -0.7 |
| Nov | – | – | – |
| Dec | – | – | – |