Zonneschijn — 2004
| Month | Manhay | Ferrières | Difference |
|---|---|---|---|
| Jan | – | 85.9 uren | – |
| Feb | – | 155.1 uren | – |
| Mar | – | 231.6 uren | – |
| Apr | – | 282.9 uren | – |
| May | – | 340.9 uren | – |
| Jun | – | 335.5 uren | – |
| Jul | – | 336.6 uren | – |
| Aug | – | 303.1 uren | – |
| Sep |
| – |
| 262.6 uren |
| – |
| Oct | – | 203.2 uren | – |
| Nov | – | 125.1 uren | – |
| Dec | – | 119.8 uren | – |