Montreal / Pierre Elliot Trudeau International Airport, Que weather by month
Averages and records for each calendar month at Montreal / Pierre Elliot Trudeau International Airport, Que, Canada, from 2013 to 2024. The warmest month is July, averaging 27.1°C; the coolest is January at −4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −4.1°C | −12.2°C | 10.0°C12 January 2018 | −27.5°C8 January 2015 | 11 / 11 |
| February | −2.7°C | −11.7°C | 14.9°C27 February 2024 | −27.9°C3 February 2023 | 11 / 12 |
| March | 2.6°C | −6.0°C | 21.0°C25 March 2021 | −20.8°C11 March 2017 | 11 / 12 |
| April | 11.1°C | 1.3°C | 27.9°C13 April 2023 | −10.0°C4 April 2016 | 12 / 12 |
| May | 20.2°C | 8.8°C | 36.6°C27 May 2020 | −0.6°C8 May 2020 | 11 / 11 |
| June | 24.2°C | 14.0°C | 34.8°C22 June 2020 | 2.8°C1 June 2020 | 11 / 11 |
| July | 27.1°C | 17.4°C | 36.1°C10 July 2020 | 9.1°C25 July 2013 | 11 / 11 |
| August | 26.1°C | 16.5°C | 34.0°C21 August 2021 | 8.5°C27 August 2020 | 11 / 11 |
| September | 21.9°C | 11.9°C | 32.2°C7 September 2015 | 1.2°C19 September 2014 | 11 / 11 |
| October | 14.6°C | 5.8°C | 29.3°C4 October 2023 | −5.9°C31 October 2020 | 11 / 11 |
| November | 5.8°C | −1.7°C | 24.3°C5 November 2022 | −17.8°C22 November 2018 | 11 / 11 |
| December | −0.3°C | −7.2°C | 16.9°C24 December 2015 | −26.6°C28 December 2017 | 11 / 11 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 11 to 12 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.