Montreal lies at the confluence of several climatic regions. Usually, the climate is classified as humid continental or hemiboreal (Köppen climate classification Dfb).
Montreal's summers are warm, but often muggy with average high temperatures of 26°C (79°F) and low of 16°C (61°F), temperatures frequently exceed 30°C (86°F). Winter in Montreal usually brings very cold, snowy, windy, and at times, icy weather, with an average high temperature of -9°C (23°F) and lows of -16°C (9°F). However, some winter days are with milder temperatures, and others below -20°C (-4°F)
Spring and fall are pleasantly mild but are prone to drastic temperature changes. Late season heat waves as well as "Indian summers" are a common occurrence as well as snow storms in November, March and April.
The lowest temperature ever recorded was -37.8 °C (-36 °F) on January 15, 1957, and the highest temperature was 36.6 °C (98 °F) on August 1, 1975.
Annual precipitation is around 98 cm (39 in), including an average 218 cm (86 in) of snowfall, which occurs from November through March. Thunderstorms are common beginning in the late spring through summer to early fall period, additionally, tropical storm remnants can cause heavy rains. The city gets over 2,000 hours of sunshine annually, with summer being the sunniest, but is also the slightly wetter season