Zonneschijn — 1997
| Month | Ferrières | Hamoir | Difference |
|---|---|---|---|
| Jan | 150.3 uren | – | – |
| Feb | 117.3 uren | – | – |
| Mar | 214.8 uren | – | – |
| Apr | 287.8 uren | – | – |
| May | 328.1 uren | – | – |
| Jun | 302.7 uren | – | – |
| Jul | 340.5 uren | – | – |
| Aug | 333.6 uren | – | – |
| Sep |
| 287.5 uren |
| – |
| – |
| Oct | 198.8 uren | – | – |
| Nov | 99.4 uren | – | – |
| Dec | 64.8 uren | – | – |