Temperatuur — 1999
| Month | Mont-Saint-Guibert | Court-Saint-Étienne | Difference |
|---|---|---|---|
| Jan | – | 5.2 °C | – |
| Feb | – | 2.9 °C | – |
| Mar | – | 7.3 °C | – |
| Apr | – | 9.8 °C | – |
| May | – | 14.4 °C | – |
| Jun | – | 15.3 °C | – |
| Jul | – | 19.2 °C | – |
| Aug | – | 18 °C | – |
| Sep |
| – |
| 17.8 °C |
| – |
| Oct | – | 10.8 °C | – |
| Nov | – | 5.9 °C | – |
| Dec | – | 4.3 °C | – |