Temperatuur — 2026
| Month | Herstal | Liège | Difference |
|---|---|---|---|
| Jan | 3 °C | 3 °C | +0.0 |
| Feb | 6.8 °C | 6.8 °C | +0.0 |
| Mar | 8.6 °C | 8.7 °C | -0.1 |
| Apr | 12.6 °C | 12.8 °C | -0.2 |
| May | 14.7 °C | 14.9 °C | -0.2 |
| Jun | 19.6 °C | 19.7 °C | -0.1 |
| Jul | 20.5 °C | 20.6 °C | -0.1 |
| Aug |
| 20.1 °C |
| 20.2 °C |
| -0.1 |
| Sep | 18.5 °C | 18.6 °C | -0.1 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |