Zonneschijn — 1999
| Month | Court-Saint-Étienne | Ottignies-Louvain-la-Neuve | Difference |
|---|---|---|---|
| Jan | 112.7 uren | – | – |
| Feb | 148.6 uren | – | – |
| Mar | 221.8 uren | – | – |
| Apr | 283.2 uren | – | – |
| May | 352.7 uren | – | – |
| Jun | 370.7 uren | – | – |
| Jul | 357.2 uren | – | – |
| Aug | 328.3 uren | – | – |
| Sep | 259.2 uren | – | – |
| Oct | 211.9 uren | – | – |
| Nov | 142.6 uren | – | – |
| Dec | 98.4 uren | – | – |