Canada generally has 4 seasons, with extremely cold winters (December – February) and hot summers (July – August). It typically rains in November throughout most cities. The type of activity you want to do may dictate when you should visit Canada. For example, if you plan to ski, you should visit during the cold winters.
Since Canada is large, the weather does vary. In Vancouver, temperatures will reach the highest average of 22C in August, and the lowest average of 4C in January. There tends to be a lot of rainfall in the autumn, especially November.
Toronto is slightly hotter in the summer, reaching an average of around 21C in July. However, it gets colder during the winter, entering minus weather (-3C) in January. Surprisingly, July is also the wettest month.
Although the summers tend to fluctuate around the same level, it gets colder the more you travel east. Ottawa has an average temperature of 22C in July, and reaches an average temperature of -10C in the winter! July is also the wettest month in the city.
Montreal’s weather is very similar to Ottawa. The city is also more prone to snowy winters.