Montreal Average Monthly Temperatures

Montreal Average Temperatures by Month

Montreal Place d'Armes
••• Place d'Armes, Montreal. Atlantide Phototravel / Getty Images

Montreal Average Monthly Temperatures: The Lowdown

Montreal weather is notoriously bipolar. Showers, snow, freezing rain, followed by warm sun and elimination of all torrential evidence in the span of one day? Entirely possible. Sometimes probable.

So if you plan on making the best of your time in Montreal which, incidentally, is not very hard to do, consider getting the scoop on local weather trends and dress the part.

After all, as said author Alfred Wainwright, "there's no such thing as bad weather, only unsuitable clothing." A month by month breakdown of Montreal's average monthly temperatures is just below.*


Montreal Average Monthly Temperatures: January

The statistically coldest month of the year in Montreal, January is more than manageable with the right clothes. And a fearless attitude.


Montreal Average Monthly Temperatures: February

February temperatures in Montreal are comparable to January's, so be prepared to bundle up.

  • Average February temperature: -7.2ºC / 19ºF
  • Average February high (day): -3.7ºC / 25ºF
  • Average February low (night): -10.6ºC / 13ºF
  • Record high: 15ºC / 59ºF


Montreal Average Monthly Temperatures: March

March is still very much steeped in winter in these parts, but the edge is usually off by the second half on the month. Some years feature spring thaw this time of year.

Yet others see winter persist.


Montreal Average Monthly Temperatures: April

Spring most definitely rears its budding head in April in Montreal. The question is when.


Montreal Average Monthly Temperatures: May

May is a beauty. The flowers start blooming, locals shed their winter duds and the comfortable temperatures are the delightful norm.


Montreal Average Monthly Temperatures: June

June is a hotbed of activity in Montreal. And it tends to get piping hot by month's end, if not earlier. 

  • Average June temperature: 19.3ºC / 67ºF
  • Average June high (day): 23.7ºC / 75ºF


Montreal Average Monthly Temperatures: July

Hot and humid is the way of Montreal summers. Let's just say dry heat is a rare miracle.


Montreal Average Monthly Temperatures: August

August in Montreal? Still hot. Still humid. Mind you, anything is possible. We're talking weather, after all.

  • Average August temperature: 20.8ºC / 69ºF
  • Average August high (day): 24.8ºC / 77ºF
  • Average August low (night): 16.7ºC / 63ºF
  • Record high: 35.6ºC / 96ºF
  • Record low: 6.1ºC / 43ºF


Montreal Average Monthly Temperatures: September

Cooler, yet still summery temperatures persist the first half of September in Montreal. 


Montreal Average Monthly Temperatures: October

Indian summers are very much a possibility in October in Montreal. You never know. Layers are key as even a hot day is generally followed by a cool, crisp night.


Montreal Average Monthly Temperatures: November

November gets chilly in Montreal. Not bone-chilling chilly, but definitely cool. 


Montreal Average Monthly Temperatures: December

And so begins winter in Montreal, usually halfway through the month, if not earlier. Late winter onsets have also been known to happen, though a white snowy holiday season is more common than not.


*Source: Environment Canada. Average temperatures and record data retrieved September 14, 2010. All information is subject to quality assurance checks by Environment Canada and may change without notice. Note that all weather statistics as presented above are averages compiled from weather data collected over a 30-year period.