Montreal lies at the confluence of several climatic regions. Usually, the climate is classified as humid continental or hemiboreal.

Precipitation is abundant with an average snowfall of 2.25 metres (84 in) per year in the winter. Regular rainfall throughout the year averages 900 mm (35.3 in). Summer is the wettest season statistically, but it is also the sunniest.

The coldest month of the year is January which has a daily average temperature of -10.4 C (13 F) - averaging a daily low of -14.9 C (5.2 F), colder than either Moscow (-10 C) or Saint Petersburg (-6 C). Due to wind chill, the perceived temperature can be much lower than the actual temperature, and wind chill factor is often included in Montreal weather forecasts. The warmest month is July which has an average daily high of 26.3 C (79.3 F); lower nighttime temperatures make an average of 20.9 C (69.6 F) thus air exchangers often achieve the same result as air conditioners. The lowest temperature ever recorded was -37.8 C (-36.0 F) on 15 January 1957 and the highest temperature ever was 37.6 C (99.7 F) on 1 August 1975. High humidity is common in the summer which makes the perceived temperature higher than the actual temperature. In spring and autumn, rainfall averages between 55 and 94 millimetres (2.2 and 3.7 in) a month. Some snow in spring and autumn is normal. Similarly, late heat waves as well as "Indian summers" are a regular feature of the climate.

additional information from Wikipedia

02/14/08 by visitEarth
Tags: Montreal, weather, Quebec, Canada, winter, cold