Mcmurdo 12Z 500hPa temperature 1956 - - - - - - - -44.1 -41.4 -42.7 - - 1957 - - - -40.8 -39.1 -41.3 -42.4 -42.7 -41.4 -37.9 -37.3 -35.0 1958 - - -37.7 -36.4 -40.9 -42.0 -44.0 -41.9 -45.6 -41.9 -40.3 -37.7 1959 -32.4 -33.0 -37.2 - -41.3 -43.8 -42.7 -43.6 -45.7 -43.9 -38.3 -37.3 1960 -32.8 -36.1 - - - - - - - - - - 1961 -36.2 -34.4 -39.0 -38.9 -40.7 -40.7 -43.2 -44.6 -41.8 -40.3 -38.4 - 1962 -37.5 -33.4 -36.9 -41.4 -42.5 -44.8 -44.2 -41.3 -41.7 -40.2 -38.2 -37.3 1963 -32.9 -36.1 - - - - - - - -43.4 -38.0 -35.6 1964 -36.1 -39.3 - - - - - - - -40.9 -38.2 -34.8 1965 -35.2 -33.1 - - - - - - - -41.3 -37.0 -34.0 1966 -36.0 -34.9 - - - - - - - -42.5 -37.8 -36.0 1967 -32.3 -33.1 - - - - - - - -42.3 -36.5 -33.0 1968 -34.5 -35.0 - - - - - - - -41.2 -39.3 -37.2 1969 -33.8 -37.5 - - - - - - - -41.6 -39.1 -35.2 1970 -32.0 -35.1 - - - - - - - -39.3 -39.4 -35.5 1971 -33.8 -36.4 - - - - - - - -38.7 -37.8 -36.6 1972 -30.4 -34.1 - - - - - - - -42.7 -39.2 -34.8 1973 -33.5 -37.8 - - - - - - - -40.3 -35.9 -35.3 1974 -31.6 -36.0 - - - - - - - -40.3 -36.6 -33.0 1975 -34.2 -36.6 - - - - - - - -42.1 -35.3 -34.2 1976 -30.0 -34.2 - - - - - - - -45.5 -39.0 -33.3 1977 -31.3 -36.6 - - - - - - - -40.3 -38.8 -34.5 1978 -35.8 -32.9 - - - - - - - -41.9 -38.1 -36.7 1979 -35.4 -37.9 - - -43.2 -43.6 - -46.1 - - -36.9 -34.2 1980 -30.9 -34.3 - - - - - - - -41.4 -37.0 -35.4 1981 -35.4 -33.3 - - - - - - - - - - 1982 - - - - - - - - - -42.2 -37.1 -33.5 1983 - - - - - - - - - - -38.4 -33.3 1984 -31.1 -33.5 - - - - - - - -39.2 -36.3 -34.5 1985 -30.6 -35.9 - - - - - - - -41.1 -38.6 -36.6 1986 - -34.1 - - - - - - - -40.5 -38.8 -33.6 1987 -33.1 -36.0 - - - - - - - -39.2 -38.1 -35.2 1988 -35.1 -36.1 - - - - - - - -38.7 -37.3 -34.4 1989 -34.5 -33.5 - - - - - - - -40.0 -38.8 -32.7 1990 -33.7 -37.5 - - - - - - -41.9 -39.8 - -31.4 1991 -29.0 -33.2 - - - - - - - -36.9 -34.8 -31.9 1992 - -34.3 - - - - - - - -40.7 -34.4 -34.3 1993 -31.5 -34.2 - - - - - - - -41.2 -38.1 -34.7 1994 -34.5 -37.7 -39.3 -38.9 - - - - - - -37.9 -34.7 1995 -35.0 -33.8 - - - - - - - -38.9 -38.2 -36.0 1996 -36.0 -35.6 - - - - - - -43.3 -41.4 -36.0 -33.7 1997 -34.4 -36.7 - - - - - - - -38.5 -32.4 -35.9 1998 -36.2 -32.7 - - - - - -37.4 - -36.3 -36.2 -36.0 1999 -34.7 -34.2 - - - - - - - -39.7 -37.7 -34.4 2000 -36.1 -36.5 - - - - - - - -39.7 -36.9 -35.5 2001 -33.6 -35.7 - - - - - -42.5 - -39.8 -38.0 -33.6 2002 -31.7 -34.8 - - - - - -43.1 - -39.6 -36.7 -34.8 2003 -31.8 -34.7 - - - - - - -41.8 -41.5 -36.6 -33.5 2004 -31.3 -31.7 - - - - - -41.8 - -40.6 -36.2 -34.2 2005 -32.0 -34.6 - - - - - - - -39.3 -37.4 -31.8 2006 -33.5 -35.8 - - - - - - - -38.4 -35.4 -36.4 2007 -31.3 -33.4 - - - - - - - -39.6 -38.4 -35.0 2008 -32.5 -38.4 - - - - - - -41.6 -39.7 -37.5 -33.6 2009 -33.9 -33.6 - - - - - - - -40.5 -36.6 -35.6 2010 -30.8 -34.2 - - - - - -43.3 -37.8 -39.1 -37.2 -33.5 2011 -34.5 -35.0 - - - - - -41.6 - -40.1 -35.8 -34.0 2012 -33.7 -34.4 - - - - - -40.8 - -40.0 -36.5 -32.9 2013 -30.6 -34.6 - - - - - - - -40.5 -39.1 -33.9 2014 -31.2 - - - - - - - - - - - 2015 - - - - - - - - - - - - 2016 - - - - - - - - - - - - 2017 - - - - - - - - - -38.5 -37.6 -36.1 2018 -32.0 -35.5 - - - - - - - -39.5 -35.6 -34.3 2019 -33.1 -34.9 - - - - - -40.8 -42.3 -40.8 -35.4 -33.3 2020 -33.6 -32.0 - - - - - - - -40.3 -39.0 -33.9 2021 - -34.5 -39.2 - - - - -39.1 - -38.5 -37.9 -35.2 2022 -35.1 -34.4 - - - - -41.1 -42.5 - -38.7 -36.9 -34.3 2023 -34.7 -36.4 - - - - - -44.7 -41.0 -41.3 -38.0 -34.7 2024 -33.5 -35.1 -36.8 -40.3 - - - - - - - -