Zonneschijn — 1997
| Month | Rijkevorsel | Merksplas | Difference |
|---|---|---|---|
| Jan | 142.4 uren | 142.3 uren | +0.1 |
| Feb | 138.7 uren | 138.6 uren | +0.1 |
| Mar | 218.9 uren | 218.9 uren | +0.0 |
| Apr | 282.2 uren | 282.3 uren | -0.1 |
| May | 328.3 uren | 328.3 uren | +0.0 |
| Jun | 337 uren | 337.1 uren | -0.1 |
| Jul | 358.2 uren | 358.1 uren | +0.1 |
| Aug | 338.3 uren | 338.3 uren | +0.0 |
| Sep | 276.1 uren | 276.2 uren | -0.1 |
| Oct | 199.1 uren | 199.1 uren | +0.0 |
| Nov | 106.7 uren | 106.7 uren | +0.0 |
| Dec | 85.6 uren | 85.6 uren | +0.0 |