Zonneschijn — 2020
| Month | Zwijndrecht | Ridderkerk | Difference |
|---|---|---|---|
| Jan | 149.4 uren | 144.7 uren | +4.7 |
| Feb | 187.7 uren | 184.4 uren | +3.3 |
| Mar | 298 uren | 299.1 uren | -1.1 |
| Apr | 367.1 uren | 367.1 uren | +0.0 |
| May | 425.8 uren | 428.9 uren | -3.1 |
| Jun | 419.1 uren | 419.8 uren | -0.7 |
| Jul | 408.3 uren | 415.3 uren | -7.0 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |