Temperatuur — 2025
| Month | Ridderkerk | Hendrik-Ido-Ambacht | Difference |
|---|---|---|---|
| Jan | 3.8 °C | – | – |
| Feb | 3.9 °C | – | – |
| Mar | 7.4 °C | – | – |
| Apr | 11.6 °C | – | – |
| May | 14.4 °C | – | – |
| Jun | 18.4 °C | – | – |
| Jul | 19.2 °C | – | – |
| Aug | 18.8 °C | – | – |
| Sep |
| 15.6 °C |
| – |
| – |
| Oct | 12.3 °C | – | – |
| Nov | 8.1 °C | – | – |
| Dec | 6.1 °C | – | – |