Palmer 18Z temperature 1976 - - - - - - - - - - - - 1977 - - - - - - - - - - - - 1978 - - - - - - - - - - - - 1979 2.2 1.8 0.9 -0.6 -5.2 -6.6 -6.6 -6.6 -3.6 -2.4 0.3 2.3 1980 2.6 3.0 -0.6 - -3.5 -6.7 -13.1 -11.4 -5.6 - -0.2 - 1981 2.0 0.6 0.5 - -4.6 -5.3 -5.8 -7.8 -6.1 -3.1 -1.0 0.0 1982 - 0.4 -0.5 -2.8 -2.1 -5.1 -9.5 -7.2 -6.8 -3.5 -0.6 3.7 1983 3.9 2.8 1.0 0.0 -1.5 -2.6 -2.5 -3.8 -2.5 -0.9 1.9 - 1984 - - - - -3.6 - -7.0 -6.7 -2.4 - - - 1985 5.6 4.7 2.4 -0.4 -3.8 -3.5 - - - - - 4.6 1986 5.5 5.0 3.4 1.0 -4.2 -4.8 -5.5 -9.1 -6.1 -1.2 0.8 2.0 1987 3.2 2.4 - - - - -16.3 - - 0.0 1.4 2.3 1988 2.9 3.2 1.6 0.6 -1.4 -2.9 -2.8 - - 1.3 2.6 3.1 1989 - - - - - - - -1.5 - - - 3.7 1990 - 4.3 - -1.3 -1.9 - -3.0 -6.2 - - - - 1991 - - - - - - - - - - - - 1992 - - - - - - - - - - - - 1993 - - 1.1 - - - - -3.5 - - - - 1994 - - 1.7 -0.1 - - - -5.6 - -4.3 2.2 - 1995 - - - -0.1 - - - - - -0.4 0.0 - 1996 - - - - - - - - -0.5 - - - 1997 - - - -1.2 -2.4 - - -5.9 - - - - 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - - - -0.2 - - - - - - 1.7 2002 - - 0.7 0.8 -4.4 -8.5 - -6.2 -1.7 -3.1 0.4 2.4 2003 4.1 3.2 1.3 0.0 -2.3 -4.6 -3.2 -1.9 -3.5 -1.2 0.4 2.0 2004 3.8 2.7 2.0 0.1 -2.1 -3.0 -3.0 -6.4 -5.5 -2.6 1.2 2.8 2005 2.3 2.0 1.1 -0.3 -2.3 -5.6 -5.5 -5.6 -1.1 0.3 1.6 1.9 2006 3.3 3.3 2.9 - - -2.8 -4.3 -5.6 -4.9 0.8 0.4 3.2 2007 3.7 2.8 1.0 -1.4 -1.9 -4.3 -6.3 -4.3 -1.8 -1.3 0.3 1.9 2008 2.7 2.8 2.0 -0.5 -0.8 -1.8 -3.9 -6.4 -0.2 0.0 1.1 1.3 2009 3.3 3.5 2.5 -1.1 -0.9 -3.9 -5.6 -3.3 -3.6 -2.0 0.0 1.9 2010 2.8 2.7 0.9 -0.6 -1.4 - - - - - 1.3 2.7 2011 3.0 2.9 2.3 -1.2 -1.0 -4.1 -6.3 -6.4 -5.4 -0.9 1.1 2.1 2012 2.1 2.1 2.1 -0.3 -0.5 -4.8 -3.3 -3.0 -2.3 -2.7 -0.4 2.1 2013 3.1 2.5 2.2 0.9 -1.8 -3.5 -5.3 -5.9 -5.5 -1.4 -0.3 1.0 2014 2.3 1.8 0.8 0.1 -0.7 -2.7 -3.7 -4.6 - -1.6 -0.1 1.6 2015 2.6 2.0 1.1 0.0 -2.4 -6.2 -10.1 -7.8 -8.0 -0.9 0.5 1.9 2016 1.7 2.4 0.9 -2.1 -2.0 -1.9 -6.4 -7.2 -1.0 0.8 1.4 3.5 2017 4.6 4.1 - -0.4 -0.6 -3.2 -4.5 -3.9 -7.1 -2.9 -0.6 1.9 2018 2.5 3.3 1.8 0.4 -3.0 -3.3 -4.7 -5.9 -4.8 -2.1 -0.1 0.9 2019 2.0 1.5 1.2 -0.3 -2.9 -3.2 -4.3 -4.4 -5.6 -2.0 -0.5 1.6 2020 3.6 2.8 1.1 -0.1 -2.0 -2.6 -4.7 -4.8 -4.2 -2.0 0.6 1.4 2021 2.8 2.6 1.2 -0.7 -1.7 -2.5 -3.0 -6.1 -1.4 -0.4 0.8 1.3 2022 2.6 2.5 1.2 -0.2 -0.8 -2.1 -2.4 -1.3 -0.3 -1.1 1.0 2.7 2023 3.4 2.9 1.6 0.3 -0.5 -2.7 -2.9 -5.5 -4.0 -2.3 -0.3 1.2 2024 2.6 2.4 1.2 -1.0 - - - - - - - -