Temperatuur — 2009
| Month | Court-Saint-Étienne | Ottignies-Louvain-la-Neuve | Difference |
|---|---|---|---|
| Jan | 0.2 °C | – | – |
| Feb | 3.1 °C | – | – |
| Mar | 6 °C | – | – |
| Apr | 11.7 °C | – | – |
| May | 13.7 °C | – | – |
| Jun | 15.6 °C | – | – |
| Jul | 18.3 °C | – | – |
| Aug | 19.1 °C | – | – |
| Sep |
| 15.6 °C |
| – |
| – |
| Oct | 11.3 °C | – | – |
| Nov | 9.4 °C | – | – |
| Dec | 2.6 °C | – | – |