Henderickson Automatic Weather Reporting System climate by month
Averages and records for each calendar month at Henderickson Automatic Weather Reporting System, Canada, from 1995 to 2024. The warmest month is July, averaging 19.7°C; the coolest is December at −4.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.4°C | −17.8°C | 15.3°C29 January 2024 | −48.1°C15 January 2020 | 25 / 29 |
| February | −1.7°C | −17.1°C | 13.5°C11 February 2006 | −45.3°C9 February 2021 | 23 / 29 |
| March | 1.5°C | −14.9°C | 19.9°C21 March 2019 | −44.6°C10 March 2009 | 24 / 29 |
| April | 6.5°C | −8.4°C | 23.3°C18 April 2016 | −31.9°C2 April 2002 | 19 / 28 |
| May | 12.8°C | −2.8°C | 28.6°C15 May 2023 | −20.5°C9 May 1996 | 20 / 28 |
| June | 16.9°C | 1.2°C | 38.3°C30 June 2021 | −8.7°C8 June 2009 | 18 / 27 |
| July | 19.7°C | 3.3°C | 31.6°C1 July 2021 | −5.0°C1 July 2009 | 19 / 28 |
| August | 18.7°C | 2.2°C | 30.8°C17 August 2008 | −5.6°C24 August 2003 | 20 / 29 |
| September | 14.5°C | −1.3°C | 30.1°C6 September 2017 | −16.1°C30 September 2019 | 19 / 28 |
| October | 7.8°C | −6.1°C | 26.0°C1 October 2008 | −28.1°C28 October 2019 | 20 / 29 |
| November | 0.1°C | −13.3°C | 18.6°C8 November 2016 | −42.0°C29 November 2014 | 21 / 29 |
| December | −4.1°C | −18.2°C | 14.2°C27 December 1999 | −48.2°C20 December 2022 | 22 / 29 |
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 18 to 25 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.