Fort Smith climate by month
Averages and records for each calendar month at Fort Smith, Canada, from 2003 to 2026. The warmest month is July, averaging 23.9°C; the coolest is January at −16.6°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −16.6°C | −24.8°C | 4.1°C15 January 2026 | −45.1°C12 January 2024 | 23 / 23 |
| February | −14.3°C | −25.1°C | 9.9°C16 February 2017 | −44.5°C7 February 2021 | 22 / 23 |
| March | −5.9°C | −19.1°C | 16.7°C19 March 2019 | −41.7°C9 March 2009 | 21 / 23 |
| April | 5.2°C | −7.1°C | 23.7°C21 April 2010 | −30.5°C3 April 2014 | 23 / 23 |
| May | 15.7°C | 2.1°C | 33.2°C29 May 2025 | −17.3°C1 May 2019 | 22 / 23 |
| June | 22.0°C | 8.5°C | 33.7°C27 June 2006 | −3.1°C5 June 2011 | 21 / 23 |
| July | 23.9°C | 10.9°C | 35.8°C10 July 2012 | −0.6°C10 July 2009 | 21 / 23 |
| August | 21.7°C | 9.3°C | 35.0°C30 August 2025 | −1.6°C30 August 2007 | 22 / 24 |
| September | 15.2°C | 3.8°C | 30.1°C3 September 2022 | −7.9°C19 September 2018 | 22 / 24 |
| October | 5.3°C | −2.2°C | 23.8°C3 October 2003 | −18.3°C25 October 2004 | 22 / 23 |
| November | −6.7°C | −13.5°C | 12.9°C19 November 2005 | −35.6°C27 November 2006 | 21 / 23 |
| December | −15.3°C | −23.1°C | 7.9°C13 December 2023 | −41.4°C31 December 2013 | 22 / 23 |
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 21 to 23 years each.
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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.