Zonneschijn — 1999
| Month | Borgloon | Wellen | Difference |
|---|---|---|---|
| Jan | 107.7 uren | – | – |
| Feb | 145.8 uren | – | – |
| Mar | 224 uren | – | – |
| Apr | 286.2 uren | – | – |
| May | 344.5 uren | – | – |
| Jun | 363.4 uren | – | – |
| Jul | 357.4 uren | – | – |
| Aug | 322.8 uren | – | – |
| Sep |
| 257.9 uren |
| – |
| – |
| Oct | 213.2 uren | – | – |
| Nov | 132.3 uren | – | – |
| Dec | 94.5 uren | – | – |