Zonneschijn — 2026
| Month | Ridderkerk | Krimpen aan den IJssel | Difference |
|---|---|---|---|
| Jan | 116.1 uren | 113.6 uren | +2.5 |
| Feb | 123.9 uren | 125.8 uren | -1.9 |
| Mar | 270.9 uren | 270.3 uren | +0.6 |
| Apr | 29.2 uren | 28 uren | +1.2 |
| May | 420.1 uren | 422 uren | -1.9 |
| Jun | 420.7 uren | 423.6 uren | -2.9 |
| Jul | 439.4 uren | 440.8 uren | -1.4 |
| Aug | 391.8 uren | 392.6 uren | -0.8 |
| Sep | 306.4 uren | 309 uren | -2.6 |
| Oct | 234.5 uren | 236.6 uren | -2.1 |
| Nov | – | – | – |
| Dec | – | – | – |