Montréal Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Montréal, Quebec during each month of the year.
The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 10, 20 or 30 °C each month in Montréal, scroll down farther. There are also monthly and yearly counts of days with frost and cold weather.
The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1981 to 2010 weather.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 24 | 9 | January | -4 | -13 |
| 26 | 12 | February | -3 | -11 |
| 37 | 22 | March | 3 | -6 |
| 52 | 34 | April | 11 | 1 |
| 68 | 49 | May | 20 | 9 |
| 75 | 57 | June | 24 | 14 |
| 81 | 63 | July | 27 | 17 |
| 79 | 62 | August | 26 | 16 |
| 72 | 53 | September | 22 | 12 |
| 57 | 42 | October | 14 | 5 |
| 42 | 28 | November | 6 | -2 |
| 30 | 18 | December | -1 | -8 |
| 54 | 37 | Year | 12 | 3 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 22 | 7 | January | -5 | -14 |
| 26 | 10 | February | -3 | -12 |
| 37 | 20 | March | 3 | -7 |
| 53 | 34 | April | 12 | 1 |
| 66 | 46 | May | 19 | 8 |
| 75 | 56 | June | 24 | 13 |
| 79 | 61 | July | 26 | 16 |
| 77 | 59 | August | 25 | 15 |
| 69 | 50 | September | 21 | 10 |
| 55 | 39 | October | 13 | 4 |
| 43 | 29 | November | 6 | -2 |
| 29 | 15 | December | -1 | -9 |
| 53 | 36 | Year | 12 | 2 |
Days of Hot Weather in Montréal
Montréal usually has nine days a year with temperatures in the low-thirties Celsius. The 30-degree weather can show up here anytime during summer months, and occasionally as early as May.
| 10 °C 50 °F |
20 °C 68 °F |
30 °C 86 °F | |
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 0 | 0 | 0 |
| March | 3 | 0 | 0 |
| April | 17 | 3 | 0 |
| May | 30 | 12 | 0 |
| June | 30 | 24 | 2 |
| July | 31 | 30 | 4 |
| August | 31 | 29 | 2 |
| September | 30 | 17 | 1 |
| October | 22 | 3 | 0 |
| November | 6 | 0 | 0 |
| December | 1 | 0 | 0 |
| Year | 201 | 117 | 9 |
When Montréal Has Frosty Weather
Montréal typically has 148 days a year when the minimum temperature is at 0 °C or below. The average date for the last frost in spring is April 29. Frost normally returns here on October 11. The frost-free period extends for 165 days on average between the final spring frost and the first fall frost.
| 0 °C 32 °F | |
|---|---|
| January | 30 |
| February | 27 |
| March | 26 |
| April | 11 |
| May | 1 |
| June | 0 |
| July | 0 |
| August | 0 |
| September | 0 |
| October | 6 |
| November | 19 |
| December | 28 |
| Year | 148 |
How Often Montréal Has Cold Temperatures
Montréal's chilliest winter nights have lows in the minus-twenties °C. The city averages 14 nights a year, mostly in January, when the thermometer drops that low. Temperatures below -30 °C (-22 °F) occur just two of three times a decade.
From November to April, Montréal can remain below freezing all day long. The city typically has 74 days a year when the temperature never rises above 0 °C.
| -2 °C 28 °F |
-10 °C 14 °F |
-20 °C -4 °F | |
|---|---|---|---|
| January | 29 | 21 | 8 |
| February | 25 | 17 | 4 |
| March | 22 | 9 | 1 |
| April | 6 | 0 | 0 |
| May | 0 | 0 | 0 |
| June | 0 | 0 | 0 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 0 |
| October | 2 | 0 | 0 |
| November | 13 | 1 | 0 |
| December | 26 | 13 | 2 |
| Year | 124 | 63 | 14 |
References
Environment Canada. Meteorological Service of Canada. Canadian Climate Normals. 1981-2010 Climate Normals & Averages.
Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.