Temperatuur — 2018
| Month | Court-Saint-Étienne | Mont-Saint-Guibert | Difference |
|---|---|---|---|
| Jan | 5.4 °C | – | – |
| Feb | -0.1 °C | – | – |
| Mar | 4.7 °C | – | – |
| Apr | 12 °C | – | – |
| May | 15.3 °C | – | – |
| Jun | 17.2 °C | – | – |
| Jul | 21.6 °C | – | – |
| Aug | 19.1 °C | – | – |
| Sep |
| 14.9 °C |
| – |
| – |
| Oct | 12.2 °C | – | – |
| Nov | 7 °C | – | – |
| Dec | 5.2 °C | – | – |