Chatham Can-Mil climate by month
Averages and records for each calendar month at Chatham Can-Mil, Canada, from 2005 to 2026. The warmest month is July, averaging 26.1°C; the coolest is January at −3.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −3.5°C | −13.8°C | 13.5°C31 January 2013 | −33.0°C16 January 2009 | 20 / 21 |
| February | −2.4°C | −13.7°C | 12.2°C25 February 2016 | −30.8°C15 February 2020 | 21 / 21 |
| March | 2.5°C | −8.2°C | 26.3°C21 March 2012 | −26.7°C1 March 2008 | 21 / 21 |
| April | 8.9°C | −1.3°C | 26.6°C17 April 2012 | −16.1°C6 April 2015 | 21 / 21 |
| May | 16.7°C | 4.5°C | 33.4°C28 May 2020 | −4.0°C8 May 2022 | 20 / 21 |
| June | 21.8°C | 10.3°C | 37.2°C19 June 2020 | −1.6°C4 June 2018 | 20 / 21 |
| July | 26.1°C | 14.6°C | 37.0°C7 July 2010 | 5.3°C3 July 2007 | 20 / 21 |
| August | 24.9°C | 13.5°C | 38.3°C12 August 2025 | 3.2°C27 August 2006 | 20 / 21 |
| September | 20.6°C | 8.9°C | 35.9°C1 September 2010 | −2.5°C25 September 2018 | 20 / 22 |
| October | 13.7°C | 3.4°C | 30.6°C6 October 2025 | −7.8°C27 October 2018 | 21 / 21 |
| November | 5.9°C | −2.7°C | 24.3°C10 November 2020 | −20.2°C19 November 2018 | 19 / 21 |
| December | −0.5°C | −9.1°C | 17.1°C1 December 2020 | −26.4°C26 December 2013 | 20 / 21 |
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 19 to 21 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.