Zonneschijn — 1999
| Month | Ferrières | Hamoir | Difference |
|---|---|---|---|
| Jan | 82.2 uren | – | – |
| Feb | 137.5 uren | – | – |
| Mar | 209.5 uren | – | – |
| Apr | 271.4 uren | – | – |
| May | 329.7 uren | – | – |
| Jun | 365.9 uren | – | – |
| Jul | 354.4 uren | – | – |
| Aug | 304.6 uren | – | – |
| Sep |
| 257 uren |
| – |
| – |
| Oct | 205 uren | – | – |
| Nov | 134.6 uren | – | – |
| Dec | 77.3 uren | – | – |