Zonneschijn — 2013
| Month | Érezée | Ferrières | Difference |
|---|---|---|---|
| Jan | – | 70.8 uren | – |
| Feb | – | 130.9 uren | – |
| Mar | – | 177.8 uren | – |
| Apr | – | 239.8 uren | – |
| May | – | 232 uren | – |
| Jun | – | 306.7 uren | – |
| Jul | – | 377.2 uren | – |
| Aug | – | 329.5 uren | – |
| Sep |
| – |
| 229.7 uren |
| – |
| Oct | – | 172.8 uren | – |
| Nov | – | 78.2 uren | – |
| Dec | – | 111.1 uren | – |