Zonneschijn — 2020
| Month | Zoeterwoude | Leiden | Difference |
|---|---|---|---|
| Jan | 146.1 uren | 147.4 uren | -1.3 |
| Feb | 184.5 uren | 185.3 uren | -0.8 |
| Mar | 301.5 uren | 303.5 uren | -2.0 |
| Apr | 367.1 uren | 367.2 uren | -0.1 |
| May | 429.8 uren | 430.2 uren | -0.4 |
| Jun | 422.6 uren | 426.2 uren | -3.6 |
| Jul | 418.4 uren | 417.4 uren | +1.0 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |