Temperatuur — 2026
| Month | Capelle aan den IJssel | Krimpen aan den IJssel | Difference |
|---|---|---|---|
| Jan | – | 3 °C | – |
| Feb | – | 6 °C | – |
| Mar | 8.6 °C | 8.4 °C | +0.2 |
| Apr | 10.3 °C | 10.1 °C | +0.2 |
| May | 14.5 °C | 14.5 °C | +0.0 |
| Jun | 18.8 °C | 18.8 °C | +0.0 |
| Jul | 19.8 °C | 19.8 °C | +0.0 |
| Aug |
| 19.3 °C |
| 19.3 °C |
| +0.0 |
| Sep | 17 °C | 17 °C | +0.0 |
| Oct | 12.9 °C | 12.8 °C | +0.1 |
| Nov | – | – | – |
| Dec | – | – | – |