Zonneschijn — 1999
| Month | Sint-Gillis-Waas | Sint-Niklaas | Difference |
|---|---|---|---|
| Jan | 119.9 uren | – | – |
| Feb | 159.1 uren | – | – |
| Mar | 228.6 uren | – | – |
| Apr | 293 uren | – | – |
| May | 375.8 uren | – | – |
| Jun | 379.5 uren | – | – |
| Jul | 385.8 uren | – | – |
| Aug | 338.2 uren | – | – |
| Sep |
| 252.8 uren |
| – |
| – |
| Oct | 209 uren | – | – |
| Nov | 140.9 uren | – | – |
| Dec | 108 uren | – | – |