Overview: WhistlerWhistler (Canada) in general has a mild continental climate. The day temperatures range from -1 °C (31 °F) in December to 22 °C (71 °F) in August. The highest night temperatures could be experienced in August with 9 °C (48 °F), the lowest in December with -7 °C (20 °F). The least rainy month in Whistler is August with its 7 days of rain, the rainiest month is November, when it rains 17 days.