What's the weather like in Canada in September?In September, temperatures in Canada are starting to get cooler as the autumn sets in. Vancouver is pleasantly mild, perfect for exploring the city, while Banff has lovely warm daytime temperatures but nights are cold. Located in the east of the country near the border with the United States, Toronto is slightly warmer than the west coast towns and cities at this time of year.
AveragesIn Banff, temperatures in September reach a daytime average of 16°C, dropping to lows of a chilly 3°C at night. With just over 40mm of rain expected during the month, almost half of the days in September will have wet weather, and snow is possible. In Vancouver, temperatures in September hover around 15°C in the daytime, with highs of 18°C and lows of 10°C at night. With around eight rainy days, September is a relatively dry month. Toronto is slightly warmer, with highs of 20°C in the daytime, although the temperature dips to a chilly 9°C after dark.