THOMSEN RIVER, NWT climate by month
Averages and records for each calendar month at THOMSEN RIVER, NWT, Canada, from 1997 to 2026. The warmest month is July, averaging 12.5°C; the coolest is February at −28.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −27.6°C | −35.7°C | −1.2°C18 January 2009 | −51.8°C2 January 2020 | 22 / 27 |
| February | −28.5°C | −36.0°C | −8.7°C17 February 2006 | −52.4°C11 February 2026 | 19 / 25 |
| March | −25.4°C | −34.2°C | −5.8°C14 March 2020 | −51.3°C7 March 2020 | 21 / 25 |
| April | −15.5°C | −25.7°C | 4.0°C22 April 2010 | −41.2°C2 April 2005 | 18 / 26 |
| May | −4.2°C | −12.1°C | 9.6°C27 May 2011 | −29.3°C2 May 2007 | 20 / 23 |
| June | 7.3°C | 0.9°C | 21.0°C25 June 2012 | −11.5°C5 June 2014 | 19 / 24 |
| July | 12.5°C | 5.0°C | 25.4°C18 July 2007 | −4.1°C10 July 2025 | 18 / 26 |
| August | 9.1°C | 2.3°C | 25.1°C3 August 2006 | −6.8°C21 August 2013 | 23 / 26 |
| September | 1.1°C | −3.6°C | 14.8°C3 September 2001 | −19.1°C30 September 2019 | 23 / 28 |
| October | −8.8°C | −15.5°C | 2.4°C4 October 2011 | −36.4°C27 October 2000 | 24 / 26 |
| November | −18.5°C | −26.6°C | −1.9°C3 November 1998 | −42.7°C28 November 2004 | 23 / 26 |
| December | −24.6°C | −32.1°C | −3.9°C20 December 2010 | −47.7°C25 December 2019 | 21 / 26 |
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 24 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.