Temperatuur — 2023
| Maand | Ridderkerk | Zwijndrecht | Verschil |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mrt | 9.4 °C | 8.1 °C | +1.3 |
| Apr | 8.6 °C | 8.7 °C | -0.1 |
| Mei | 13 °C | 13.4 °C | -0.4 |
| Jun | 19.3 °C | 20.2 °C | -0.9 |
| Jul | 18.3 °C | 18.5 °C | -0.2 |
| Aug |
| 17.8 °C |
| 18.1 °C |
| -0.3 |
| Sep | 18.2 °C | 18.6 °C | -0.4 |
| Okt | 13.6 °C | 13.7 °C | -0.1 |
| Nov | 8 °C | 7.7 °C | +0.3 |
| Dec | 6.6 °C | 6.7 °C | -0.1 |