Zonneschijn — 2025
| Month | Westerlo | Olen | Difference |
|---|---|---|---|
| Jan | 81.2 uren | 90.5 uren | -9.3 |
| Feb | 136.6 uren | 144.2 uren | -7.6 |
| Mar | 290.8 uren | 308.7 uren | -17.9 |
| Apr | 308.6 uren | 319.4 uren | -10.8 |
| May | 325.1 uren | 340.6 uren | -15.5 |
| Jun | 366.9 uren | 378.8 uren | -11.9 |
| Jul | 387.6 uren | 398.2 uren | -10.6 |
| Aug | 322.5 uren | 327.4 uren | -4.9 |
| Sep | 257 uren | 265.6 uren | -8.6 |
| Oct | 127.6 uren | 129.7 uren | -2.1 |
| Nov | 118.6 uren | 131.6 uren | -13.0 |
| Dec | 97.1 uren | 104.9 uren | -7.8 |