Zonneschijn — 2020
| Month | Westerlo | Olen | Difference |
|---|---|---|---|
| Jan | 155 uren | 151 uren | +4.0 |
| Feb | 196.7 uren | 191.2 uren | +5.5 |
| Mar | 296.5 uren | 299 uren | -2.5 |
| Apr | 367.4 uren | 367.4 uren | +0.0 |
| May | 423.3 uren | 425.3 uren | -2.0 |
| Jun | 418 uren | 419.2 uren | -1.2 |
| Jul | 403.7 uren | 407.3 uren | -3.6 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |