Zonneschijn — 2023
| Month | Westerlo | Olen | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 143.1 uren | 132.7 uren | +10.4 |
| Apr | 225.5 uren | 238.5 uren | -13.0 |
| May | 342.7 uren | 349.1 uren | -6.4 |
| Jun | 391.2 uren | 399 uren | -7.8 |
| Jul | 346.1 uren | 352.3 uren | -6.2 |
| Aug |
| 313.7 uren |
| 319.7 uren |
| -6.0 |
| Sep | 281.4 uren | 285.6 uren | -4.2 |
| Oct | 190.3 uren | 199.4 uren | -9.1 |
| Nov | 105.1 uren | 115 uren | -9.9 |
| Dec | 67 uren | 72.4 uren | -5.4 |