Temperatuur — 2026
| Month | Sliedrecht | Hardinxveld-Giessendam | Difference |
|---|---|---|---|
| Jan | – | 2.7 °C | – |
| Feb | – | 6 °C | – |
| Mar | 7.7 °C | 8.3 °C | -0.6 |
| Apr | 9.7 °C | 9.7 °C | +0.0 |
| May | 15 °C | 15 °C | +0.0 |
| Jun | 19.3 °C | 19.3 °C | +0.0 |
| Jul | 20 °C | 20.1 °C | -0.1 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |