Byrd 12Z temperature 1980 - - -25.6 -21.6 -26.1 -34.7 -26.5 -30.1 -35.3 -29.4 -25.1 -16.3 1981 - -26.0 -25.3 -31.4 -32.0 -30.1 -35.8 -43.9 -36.2 -31.2 -25.9 -16.7 1982 -15.4 -21.9 -31.2 -38.5 -35.6 -30.7 -37.1 -32.1 -36.7 -31.9 -23.4 -14.4 1983 -16.4 -29.4 -28.9 -28.1 -29.8 -39.2 -40.2 -42.5 -34.2 -32.8 -25.3 -17.3 1984 -17.3 -21.2 -21.9 -27.6 -30.0 -29.0 -40.5 -40.0 -37.4 -26.7 -22.5 -14.6 1985 -15.0 -25.3 -28.3 -29.1 - -30.7 -40.6 -38.6 -33.6 -30.9 -17.7 -17.8 1986 -16.9 -22.3 -28.7 -27.3 -27.4 -37.0 -37.9 -41.5 -45.5 -31.0 -22.6 -16.4 1987 -15.6 -21.0 -34.3 -33.3 -31.4 -29.0 -27.6 -32.6 -35.1 -31.3 -26.4 -16.6 1988 -15.2 -23.0 - - - - - - - - - - 1989 - - - - - - - - - - - - 1990 - -23.4 -34.7 -30.9 -28.7 -39.8 -38.2 -41.7 -31.4 - - - 1991 - -18.0 -30.1 -29.1 -31.5 -34.0 -36.0 -38.2 -31.8 -28.0 -23.3 -13.2 1992 -17.5 -25.3 -23.8 -30.5 -24.5 - - - - - - - 1993 - - - - - - - - - - - - 1994 - -25.8 -31.6 -27.0 -31.4 -32.9 -33.8 -39.3 -38.5 -28.0 -20.1 -14.5 1995 -17.0 -19.0 -32.0 -30.6 -36.4 -27.3 -36.7 -35.6 -34.0 -33.7 -24.3 -16.8 1996 -17.0 -24.4 -29.0 - - - - - - - - - 1997 - -23.0 -29.8 -33.6 -34.6 -29.3 -35.6 -39.4 -35.0 -26.5 -21.1 -13.7 1998 -16.5 -17.5 -29.7 -35.0 -24.7 -26.4 -41.1 -35.2 -37.3 -35.9 -25.9 -18.0 1999 -15.6 -25.3 -28.1 -34.3 -33.9 - - - - - - -17.1 2000 - - - - - -30.7 -30.0 -35.1 - - - - 2001 - - - - - - - - - - - - 2002 -14.5 -21.9 -18.9 - - - - - - - - -16.2 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - -26.0 -26.9 -29.1 -28.4 -36.1 - - -20.0 -15.6 2008 -13.5 -21.4 -23.1 -28.2 -31.8 - - - - -26.1 - - 2009 - - - - - - - - - - - -