Temperatuur — 2020
| Monat | Vlaardingen | Schiedam | Unterschied |
|---|---|---|---|
| Jan | 6.8 °C | 6.5 °C | +0.3 |
| Feb | 7.4 °C | 7.3 °C | +0.1 |
| Mär | 7 °C | 6.9 °C | +0.1 |
| Apr | 10.6 °C | 10.8 °C | -0.2 |
| Mai | 12.9 °C | 13.1 °C | -0.2 |
| Jun | 16.8 °C | 17.1 °C | -0.3 |
| Jul | 17.1 °C | 17.1 °C | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |