McMurdo 18Z temperature 1956 - - - -23.0 -19.5 -24.6 -23.6 -31.8 -20.2 -20.4 -9.4 -3.0 1957 -3.8 -8.8 -18.3 -24.3 -24.3 -24.1 -26.6 -25.5 -21.4 -20.2 -8.3 -3.3 1958 -2.7 -6.8 -20.1 -21.0 -24.9 -26.1 -31.4 -29.7 -26.3 -21.3 -9.7 -6.4 1959 -3.3 -10.7 -18.3 -21.3 -25.8 -22.8 -23.7 -30.9 -25.1 -25.3 -13.0 -3.3 1960 -7.4 -11.9 -22.8 -23.4 -21.6 -24.8 -27.9 -27.6 -22.7 -17.7 -10.9 -4.9 1961 -3.2 -9.3 -19.0 -17.4 -20.6 -24.1 -29.0 -27.9 -23.1 -21.9 -9.1 -4.7 1962 -4.5 -9.6 -23.4 -21.0 -22.9 -22.0 -28.4 -28.4 -30.2 -23.4 -11.0 -5.7 1963 -4.8 -10.9 -21.0 -23.3 -27.2 -22.8 -26.6 -25.3 -24.0 -20.2 -9.0 -4.3 1964 -5.4 -11.9 -19.0 -19.9 -26.7 -19.3 -22.7 -31.8 -24.7 -19.7 -8.2 -3.8 1965 -3.5 -8.5 -21.3 -20.5 -29.3 -28.0 -22.5 -24.0 -24.8 -19.1 -10.2 -2.2 1966 -4.5 -8.2 -11.6 -21.0 -27.4 -19.1 -23.6 -28.6 -26.5 -18.8 -8.5 -4.0 1967 -2.4 -5.8 -19.3 -24.7 -22.7 -20.4 -24.3 -22.8 -24.9 -22.3 -10.6 -3.9 1968 -4.2 -7.5 -15.1 -19.9 -23.3 -23.9 -26.3 -29.9 -32.9 -19.6 -10.0 -4.8 1969 -3.8 -10.0 -15.6 -21.8 -23.5 -25.1 -30.0 -25.0 -25.2 -20.2 -10.2 -2.7 1970 -2.8 -8.3 -13.0 -19.9 -24.7 -21.8 -25.5 -29.8 -23.4 -15.8 -11.4 -2.8 1971 -1.5 -9.9 -19.5 -16.3 -21.0 -23.6 -27.4 -26.3 -20.4 -20.0 -8.5 -3.1 1972 -3.2 -8.0 -15.0 -23.1 -18.9 -19.0 -23.4 -23.3 -22.0 -16.0 -10.5 -2.7 1973 -4.1 -12.4 -21.5 -21.4 -21.6 -22.8 -23.0 -21.9 -23.5 -16.3 -8.7 -4.6 1974 -2.2 -10.4 -20.9 -19.7 -21.4 -20.3 -29.3 -23.7 -30.9 -17.7 -9.2 -3.0 1975 -3.8 -8.4 -16.8 -21.5 -20.1 -22.8 -25.2 -30.9 -25.8 -23.0 -11.4 -6.2 1976 -3.5 -9.1 -17.6 -23.1 -26.6 -26.5 -21.1 -26.7 -26.3 -26.7 -12.3 -3.7 1977 -2.0 -12.3 -19.6 -22.4 -21.1 -24.2 -22.0 -23.1 -30.4 -20.1 -12.8 -6.2 1978 -6.6 - -16.4 -21.3 -22.8 -22.9 -27.3 -35.5 -24.4 -19.9 -11.0 -5.2 1979 -4.8 -9.8 -18.8 -18.4 -25.7 -22.3 -30.1 -29.3 -24.5 -22.6 -9.6 -4.1 1980 -4.5 -8.6 -18.2 -19.3 -19.6 -25.2 -22.9 -22.0 -25.4 -19.2 -9.2 -3.6 1981 -4.3 -9.7 -13.7 -24.6 -22.7 -20.1 -22.1 -24.6 -28.8 -21.3 -12.3 -4.1 1982 -4.0 -9.5 -21.8 -23.9 -23.9 -26.1 -28.8 -23.4 -27.0 -20.1 -10.4 -2.9 1983 -4.2 -13.2 -17.1 -15.6 -17.3 -24.1 -27.7 -25.1 -25.3 -19.2 -10.1 -4.0 1984 -3.8 -11.9 -15.4 -17.4 -19.1 -22.7 -23.8 -25.5 -25.4 -16.9 -9.0 -1.7 1985 -2.4 -12.0 -16.0 -22.1 -23.8 -24.4 -32.4 -26.0 -24.2 -18.3 -11.3 -5.0 1986 -4.5 -7.1 -17.0 -19.4 -19.6 -22.3 -24.6 - - -18.8 -11.0 -3.9 1987 -0.5 -10.0 -19.5 - - - - - -20.9 -17.5 -8.3 -1.1 1988 -2.9 -10.4 - -18.6 -21.1 -20.2 -23.3 -16.8 - - - -5.7 1989 -5.8 - - - - - - - - - - - 1990 - - - - - - - - - - - -3.1 1991 - - - - - - - - - - - - 1992 -3.8 - - - - - - - - - - - 1993 - - - - - - - - - - - - 1994 - - - - - - - - - - - - 1995 - -9.6 - - - - - - - - - -1.6 1996 - - - - - - - - - -19.9 - -2.1 1997 - -11.9 - - - - - - - - -5.2 -3.8 1998 - -7.1 -17.6 - - - - - - -16.8 -10.1 -3.8 1999 -2.2 -9.4 -17.9 -23.9 -24.9 -20.8 -20.5 -26.1 -19.4 -15.5 -7.2 -2.9 2000 -3.4 -11.1 -16.8 -18.3 -23.3 -24.9 -23.5 -25.6 -26.3 -20.8 -6.9 -3.9 2001 -6.3 -8.5 -20.1 -21.3 -22.4 -20.9 -22.8 -31.7 -25.0 -18.1 -8.8 -1.6 2002 -2.4 -8.7 -15.9 -20.7 -19.2 -27.3 -28.1 -29.9 -21.9 -18.0 -10.5 -4.7 2003 -2.9 -9.4 -18.0 -23.9 -19.7 -24.0 -22.4 -28.0 -23.1 -16.0 -10.3 -2.7 2004 -4.3 -10.0 -21.9 -20.8 -25.2 -24.5 -31.9 -29.7 -26.1 -18.3 -7.3 -1.9 2005 -3.0 -10.1 -18.8 -23.8 -20.4 -25.3 -25.9 -28.1 -24.3 -17.3 -9.0 -2.4 2006 -2.8 -9.0 -18.4 -25.1 -28.5 -22.1 -29.2 -19.7 -22.1 -19.2 -8.1 -4.8 2007 0.6 -10.5 -16.7 -21.3 -18.9 -19.8 -21.1 -22.4 -20.7 -20.0 -9.5 -2.8 2008 -2.8 -11.1 -16.5 -18.5 -22.5 -17.8 -25.9 -31.0 -19.0 -17.0 -11.0 -3.2 2009 -3.6 -11.9 -18.0 -17.4 -23.2 -21.6 -23.9 -25.1 -25.1 -19.3 -6.3 -3.0 2010 -3.3 -9.3 -16.1 -18.3 -22.0 -23.2 -25.8 -26.5 -25.9 -16.6 -7.9 -2.1 2011 -4.9 -9.5 -16.7 -19.4 -20.4 -20.1 -18.5 -20.2 -22.9 -17.4 -6.4 -2.6 2012 -3.8 -8.4 -16.2 -20.0 -17.3 -24.2 -24.7 -25.7 -21.7 -15.5 -9.0 -1.7 2013 -3.1 -9.9 -15.8 -23.3 -20.2 -22.0 -26.0 -23.4 -19.1 -16.8 -9.3 -2.3 2014 -1.6 -10.2 -18.2 -21.0 -17.8 -24.5 -29.5 -18.7 -16.9 -15.3 -10.5 -5.6 2015 -3.5 -7.4 -17.8 -23.7 -24.7 -23.6 -26.6 -26.5 -27.6 -17.4 -10.1 -3.6 2016 -2.6 -9.9 -17.7 -23.6 - -26.7 - -23.9 -24.8 -20.2 -10.4 -4.3 2017 -3.5 -9.1 -17.5 - -17.5 -22.6 -25.1 -22.9 -26.7 -16.2 -11.0 -5.6 2018 -3.7 -10.9 -15.5 -20.2 -22.7 -19.9 -24.5 -24.7 -24.4 -15.0 -8.6 -3.1 2019 -4.2 -8.3 -16.5 -19.4 -16.5 -24.4 -20.4 -22.6 -22.1 -18.3 -7.4 -2.5 2020 - -7.6 - -20.6 -21.0 -22.6 -23.6 -23.1 - -16.5 -9.7 -2.9 2021 -3.4 -9.9 -18.0 -25.6 -23.7 -22.0 -20.7 -29.6 -22.1 -16.0 -8.3 -2.7 2022 -3.8 -8.7 -14.3 -20.6 -17.6 -21.5 -20.8 -23.3 -22.7 - -12.5 -4.4 2023 -4.9 -8.7 -18.6 -20.5 -23.7 -20.9 -30.9 -31.8 -19.0 -19.7 -11.1 - 2024 -4.1 -12.8 -17.4 -20.3 - - - - - - - -