Cartwright, Nfld. climate by month
Averages and records for each calendar month at Cartwright, Nfld., Canada, from 1934 to 2025. The warmest month is July, averaging 18.5°C; the coolest is January at −9.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | −9.1°C | −18.2°C | 11.8°C20 January 1996 | −37.8°C18 January 1935 | 80 / 89 |
| February | −8.2°C | −18.1°C | 11.7°C4 February 1970 | −34.5°C8 February 1994 | 80 / 90 |
| March | −3.5°C | −13.3°C | 16.4°C29 March 1999 | −32.2°C12 March 1948 | 79 / 90 |
| April | 2.0°C | −6.3°C | 18.6°C29 April 2013 | −25.6°C17 April 1954 | 81 / 90 |
| May | 7.4°C | −1.2°C | 31.3°C22 May 2012 | −15.0°C1 May 1949 | 81 / 90 |
| June | 13.8°C | 3.3°C | 35.3°C25 June 1989 | −5.6°C19 June 1935 | 79 / 90 |
| July | 18.5°C | 7.1°C | 36.1°C8 July 1952 | −1.7°C23 July 1955 | 80 / 90 |
| August | 17.8°C | 7.3°C | 35.0°C13 August 2025 | −0.6°C31 August 1952 | 84 / 91 |
| September | 13.2°C | 4.4°C | 30.0°C2 September 2002 | −5.0°C29 September 1975 | 83 / 90 |
| October | 6.9°C | 0.3°C | 23.3°C24 October 1937 | −11.7°C28 October 1965 | 86 / 89 |
| November | 1.1°C | −5.0°C | 19.7°C16 November 2008 | −21.1°C25 November 1936 | 84 / 91 |
| December | −5.2°C | −12.7°C | 13.3°C5 December 1950 | −33.9°C29 December 1951 | 80 / 90 |
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 79 to 86 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.