Onefour climate by month
Averages and records for each calendar month at Onefour, Canada, from 1994 to 2026. The warmest month is July, averaging 28.4°C; the coolest is January at −3.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.1°C | −13.8°C | 18.5°C26 January 2015 | −40.3°C13 January 2024 | 32 / 32 |
| February | −1.7°C | −12.8°C | 21.0°C24 February 1995 | −36.9°C2 February 1996 | 32 / 32 |
| March | 4.7°C | −7.2°C | 24.7°C30 March 2004 | −33.7°C2 March 2019 | 31 / 33 |
| April | 12.1°C | −1.3°C | 29.8°C23 April 2012 | −21.5°C1 April 2018 | 30 / 33 |
| May | 18.2°C | 4.3°C | 33.4°C26 May 2026 | −8.4°C2 May 2005 | 31 / 31 |
| June | 22.4°C | 8.8°C | 36.7°C30 June 2008 | 0.0°C2 June 1998 | 29 / 31 |
| July | 28.4°C | 12.2°C | 40.9°C6 July 2007 | 3.8°C2 July 2019 | 30 / 32 |
| August | 27.5°C | 11.3°C | 40.0°C10 August 2018 | 0.7°C28 August 2018 | 32 / 32 |
| September | 21.6°C | 6.4°C | 37.6°C7 September 2022 | −7.0°C21 September 1995 | 30 / 32 |
| October | 12.8°C | −0.7°C | 29.4°C5 October 2021 | −21.4°C26 October 2020 | 31 / 31 |
| November | 4.2°C | −7.4°C | 22.7°C3 November 2020 | −30.7°C30 November 2014 | 31 / 31 |
| December | −2.4°C | −13.2°C | 18.0°C5 December 2023 | −36.5°C21 December 2022 | 31 / 31 |
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 29 to 32 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.