Zonneschijn — 2023
| Month | Lansingerland | Rotterdam | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 0 uren | 85.8 uren | -85.8 |
| Apr | 253.4 uren | 251.6 uren | +1.8 |
| May | 363.1 uren | 360.9 uren | +2.2 |
| Jun | 400 uren | 400.6 uren | -0.6 |
| Jul | 368.8 uren | 365.5 uren | +3.3 |
| Aug |
| 343.2 uren |
| 339.8 uren |
| +3.4 |
| Sep | 283.5 uren | 282.3 uren | +1.2 |
| Oct | 181.9 uren | 183.2 uren | -1.3 |
| Nov | 119.8 uren | 122.4 uren | -2.6 |
| Dec | 81.1 uren | 78.8 uren | +2.3 |