Fall Forecast Most of Canada should see near normal or above normal temperatures, with the warmest weather relative to normal extending from Ontario to Newfoundland.
However, we do expect a pattern reversal late in the season. For Ontario, Quebec and parts of the Maritimes, this should bring a quicker start to winter than we have often seen during the past 20 years. We have become accustomed to very mild Decembers, but this year should bring more typical amounts of winter weather during the weeks leading up to and through the holidays.
https://www.theweathernetwork.com/ca/news/article/canada-2021-fall-forecast-temperature-and-rain-averages-to-expect