Hay River/Carter Arpt climate by month
Averages and records for each calendar month at Hay River/Carter Arpt, Canada, from 1943 to 2025. The warmest month is July, averaging 21.1°C; the coolest is January at −19.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −19.0°C | −28.3°C | 10.7°C2 January 1985 | −47.8°C16 January 1962 | 70 / 82 |
| February | −15.4°C | −26.2°C | 13.9°C28 February 1968 | −48.3°C1 February 1947 | 70 / 82 |
| March | −9.1°C | −21.2°C | 16.4°C20 March 2019 | −44.4°C2 March 1945 | 69 / 82 |
| April | 2.0°C | −9.3°C | 26.0°C21 April 2010 | −38.9°C6 April 1954 | 72 / 83 |
| May | 10.9°C | 0.2°C | 34.3°C30 May 2025 | −20.5°C5 May 2002 | 70 / 83 |
| June | 17.6°C | 6.7°C | 34.0°C13 June 1989 | −5.6°C3 June 1951 | 71 / 82 |
| July | 21.1°C | 10.8°C | 35.1°C10 July 2012 | 0.7°C9 July 2009 | 71 / 82 |
| August | 19.6°C | 9.4°C | 36.7°C9 August 1981 | −1.1°C25 August 1948 | 71 / 82 |
| September | 13.0°C | 4.0°C | 30.1°C12 September 2013 | −11.7°C30 September 1974 | 70 / 81 |
| October | 4.5°C | −2.9°C | 25.4°C4 October 2003 | −24.3°C30 October 1984 | 68 / 81 |
| November | −7.6°C | −15.4°C | 15.0°C4 November 1949 | −40.8°C25 November 1985 | 69 / 81 |
| December | −15.6°C | −24.5°C | 12.2°C13 December 1944 | −47.2°C14 December 1946 | 69 / 82 |
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 68 to 72 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.