Temperatuur — 2026
| Maand | Krimpen aan den IJssel | Ridderkerk | Verschil |
|---|---|---|---|
| Jan | 3 °C | 3 °C | +0.0 |
| Feb | 6 °C | 6.1 °C | -0.1 |
| Mrt | 8.4 °C | 8.5 °C | -0.1 |
| Apr | 10.1 °C | 10.1 °C | +0.0 |
| Mei | 14.5 °C | 15 °C | -0.5 |
| Jun | 18.8 °C | 19.2 °C | -0.4 |
| Jul | 19.8 °C | 20.2 °C | -0.4 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |