Byrd 18Z temperature 1980 - - -24.5 -22.1 -26.1 -35.5 -25.7 -29.0 -34.2 -26.0 -21.5 -13.8 1981 - -22.4 -22.6 -31.9 -31.7 -29.4 -35.6 -43.4 -33.8 -28.1 -22.0 -14.4 1982 -13.4 -19.9 -29.7 -39.4 -35.7 -30.5 -37.3 -31.9 -35.2 -29.6 -20.7 -12.5 1983 -14.7 -25.4 -28.1 -28.6 -29.4 -39.7 -40.4 -42.4 -33.6 -30.2 -22.1 -14.9 1984 -15.0 -19.2 -21.6 -27.5 -29.8 -28.5 -39.9 -39.0 -36.8 -24.5 -19.4 -12.2 1985 -13.1 -22.3 -27.1 -28.4 -29.0 -30.0 -41.8 -39.7 -32.9 -27.6 -15.6 -15.0 1986 -14.5 -19.3 -28.1 -27.9 -26.9 -37.4 -35.2 -40.4 -44.5 -29.0 -20.1 -13.6 1987 -13.3 -18.5 -32.4 -33.0 -31.4 -28.6 -28.0 -32.9 -33.0 -27.1 -22.2 -13.2 1988 -12.9 -20.3 - - - - - - - - - - 1989 - - - - - - - - - - - - 1990 - -19.6 -32.0 -29.9 -27.8 -39.0 -36.7 -39.9 -31.0 - - - 1991 - -15.2 -28.9 -28.9 -29.6 -32.7 -35.1 -37.6 -31.6 -25.2 -19.7 -9.7 1992 -14.0 -22.0 -22.1 -28.9 -24.1 - - - - - - - 1993 - - - - - - - - - - - - 1994 - -20.7 -29.0 -25.5 -29.5 -32.0 -32.9 -38.7 -36.1 -24.3 -15.7 -11.0 1995 -13.2 -16.4 -29.1 -28.7 -35.5 -27.8 -35.9 -35.0 -31.9 -29.7 -20.5 -12.9 1996 -13.1 -20.2 -26.6 - - - - - - - - - 1997 - -20.1 -26.6 -33.1 -33.8 -27.7 -35.2 -38.5 -32.8 -22.8 -17.1 -9.0 1998 -12.4 -14.7 -26.6 -32.4 -24.6 -26.2 -40.4 -34.2 -34.9 -31.2 -21.0 -13.6 1999 -10.9 -20.1 -26.1 -32.7 -32.6 - - - - - - -13.5 2000 -16.0 -18.1 -21.3 -34.1 -29.8 -29.2 -29.4 -34.4 - - - - 2001 - - - - - - - - - - - - 2002 -12.2 -19.2 -20.1 - - - - - - - - -13.3 2003 -11.7 -19.1 -23.1 -27.9 -32.3 -33.2 -36.1 -36.2 - - -19.3 -11.9 2004 -12.6 -19.4 -28.2 -29.4 - - - - - - - -12.8 2005 -8.7 -22.6 -28.3 -31.5 -31.0 - - - - - - - 2006 - -14.7 -27.7 -35.8 -38.1 -31.3 -36.3 -30.0 - -24.9 -17.2 -13.1 2007 -9.3 -18.5 -22.2 -25.7 -27.1 -28.9 -30.0 -37.1 - - -17.2 -12.7 2008 -11.2 -18.2 -23.4 -29.6 -31.2 - - - - -23.7 -21.1 -14.3 2009 -13.5 -20.1 -24.7 -28.9 -32.5 -33.9 -26.4 -33.7 -35.3 -29.1 -15.5 -10.7 2010 -12.9 -17.9 -21.6 -29.9 -36.1 -35.9 -39.9 -31.7 -32.5 -26.2 -21.4 -13.9 2011 -14.7 -21.3 -26.3 -30.8 -30.8 -34.1 -23.7 -29.4 -38.1 -25.4 -19.1 -14.4 2012 -15.2 -18.6 -24.0 -30.4 -26.9 -37.2 -37.5 -36.7 -33.7 -26.6 -20.8 -11.2 2013 -11.7 -19.1 -21.4 -37.3 -32.9 -39.9 -38.4 -32.9 -33.3 -27.8 -23.2 -12.8 2014 -14.1 -21.9 -28.0 -31.1 -26.7 -32.8 -38.4 -28.4 -25.5 -24.7 -23.3 -17.4 2015 -12.8 -17.2 -28.1 -37.3 -27.5 -36.7 -39.2 -42.4 -32.3 -25.0 -22.0 -15.1 2016 -11.8 -22.4 -31.4 -31.2 -29.5 -34.4 -32.3 -33.5 -36.8 -23.6 -20.1 -12.2 2017 -14.7 -17.4 -24.0 -24.6 -28.5 -32.3 -39.3 -34.1 -41.5 -28.2 -21.7 -15.6 2018 -15.2 -20.3 -26.3 -30.2 -35.5 -35.5 -33.1 -40.1 -35.8 -23.4 -19.6 -14.6 2019 -13.5 -17.9 -26.7 -31.1 -33.5 -30.2 -30.9 -30.1 -30.8 -29.0 -19.8 -12.8 2020 -14.8 -15.8 -28.8 -31.9 -26.7 -34.0 -31.4 -35.3 -33.2 -29.5 -23.4 -15.8 2021 -15.2 -21.6 -30.3 -36.4 -30.8 -30.0 -30.5 -39.2 -35.6 -28.0 -19.8 -16.1 2022 -15.5 -18.6 -25.1 -28.8 -29.4 -34.9 -30.9 -32.0 -32.3 -30.4 -23.1 -12.6 2023 -15.2 -18.7 -26.3 -31.4 -35.9 -33.5 -30.4 -45.2 -26.5 -30.2 -21.2 -14.5 2024 -16.0 -21.7 -23.7 -30.3 -26.9 -27.4 -36.8 -34.6 -37.6 - -22.8 -