Temperatuur — 1998
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 4.2 °C | – | – |
| Feb | 5.7 °C | – | – |
| Mar | 7.3 °C | – | – |
| Apr | 9 °C | – | – |
| May | 14.8 °C | – | – |
| Jun | 16 °C | – | – |
| Jul | 16.3 °C | – | – |
| Aug | 17.2 °C | – | – |
| Sep |
| 15.1 °C |
| – |
| – |
| Oct | 10.1 °C | – | – |
| Nov | 3.6 °C | – | – |
| Dec | 4.4 °C | – | – |