Mawson climate by month
Averages and records for each calendar month at Mawson, Antarctica, from 1954 to 2026. The warmest month is January, averaging 2.6°C; the coolest is August at −15.2°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 2.6°C | −2.7°C | 10.6°C9 January 1974 | −10.0°C31 January 1994 | 71 / 72 |
| February | −1.3°C | −7.3°C | 8.0°C19 February 1991 | −17.3°C28 February 1985 | 68 / 72 |
| March | −7.0°C | −13.2°C | 4.0°C20 March 1988 | −26.3°C27 March 2016 | 70 / 73 |
| April | −11.6°C | −17.5°C | 0.0°C11 April 1991 | −33.3°C23 April 1998 | 58 / 73 |
| May | −13.2°C | −19.7°C | 0.4°C26 May 2002 | −34.5°C26 May 2012 | 56 / 73 |
| June | −13.5°C | −19.9°C | 0.7°C19 June 1997 | −34.0°C25 June 1982 | 53 / 73 |
| July | −14.8°C | −21.3°C | 5.0°C14 July 1981 | −36.0°C25 July 1979 | 57 / 73 |
| August | −15.2°C | −21.8°C | 6.7°C1 August 1977 | −35.9°C14 August 1987 | 63 / 73 |
| September | −14.2°C | −20.8°C | 0.7°C6 September 2021 | −35.8°C4 September 1982 | 63 / 73 |
| October | −9.6°C | −16.5°C | 1.5°C19 October 2018 | −29.0°C2 October 1980 | 70 / 72 |
| November | −2.5°C | −8.8°C | 6.1°C30 November 1976 | −21.5°C1 November 2006 | 70 / 72 |
| December | 2.2°C | −3.4°C | 9.3°C5 December 1989 | −11.7°C4 December 2010 | 71 / 72 |
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 53 to 71 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.