Zonneschijn — 2020
| Maand | Schiedam | Vlaardingen | Verschil |
|---|---|---|---|
| Jan | 146.1 uren | 147.4 uren | -1.3 |
| Feb | 184.5 uren | 185.3 uren | -0.8 |
| Mrt | 301.5 uren | 301.6 uren | -0.1 |
| Apr | 367.1 uren | 367.3 uren | -0.2 |
| Mei | 429.8 uren | 429.6 uren | +0.2 |
| Jun | 422.6 uren | 423.3 uren | -0.7 |
| Jul | 418.4 uren | 419.5 uren | -1.1 |
| Aug | – | – | – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |