Zonneschijn — 1999
| Month | Kortessem | Borgloon | 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 | – |