Marsh 12Z temperature 1970 0.7 0.6 -1.3 -3.3 -7.2 -8.1 -3.5 -6.1 -1.4 -1.4 -0.1 0.4 1971 1.4 1.0 0.5 -1.1 -6.8 -2.4 -4.2 -6.4 -4.2 -1.2 0.0 -0.5 1972 1.2 0.6 -0.1 -2.2 -3.0 -7.2 -4.9 -9.4 -4.1 -2.0 -0.9 1.5 1973 0.2 1.1 0.2 -2.1 -5.9 -9.3 -6.5 -4.8 -5.2 -2.0 -0.8 0.6 1974 - - - - - - - - - - - - 1975 1.3 1.0 0.5 -1.7 -4.7 -7.9 -11.6 -10.6 -4.8 -1.2 -1.1 0.2 1976 0.9 1.7 0.2 -0.5 -3.1 -4.9 -10.4 -8.5 -6.1 -2.5 -0.2 0.2 1977 1.0 1.3 -0.2 -0.6 -2.9 -4.5 -8.0 -8.3 -7.4 -2.9 -0.3 0.2 1978 1.5 1.7 0.4 -1.1 -1.0 -5.1 -11.1 -7.8 -3.5 -1.7 -1.3 0.5 1979 2.5 1.8 0.9 -0.3 -3.0 -4.7 -4.3 -6.1 -3.4 -2.8 -1.5 0.8 1980 1.7 1.3 -0.4 -4.7 -3.2 -7.4 -11.9 -11.3 -8.0 -3.5 -2.5 0.4 1981 0.9 1.5 0.0 -0.9 -4.0 -4.3 -4.8 -9.3 -5.8 -4.8 -1.6 0.6 1982 2.4 1.7 0.8 0.0 -0.9 -2.7 -7.1 -5.9 -4.5 -3.3 -2.0 0.9 1983 1.2 0.9 0.5 -0.9 -3.2 -5.1 -5.3 -3.0 -4.2 -2.7 -0.6 0.8 1984 0.9 1.6 0.8 -1.8 -5.9 -4.2 -4.3 -3.6 -1.8 -3.2 -0.4 0.9 1985 2.1 1.7 -0.9 -1.0 -3.8 -4.3 -2.8 -3.9 -1.6 -1.6 0.0 0.8 1986 1.1 0.8 0.9 -1.9 -7.6 -7.6 -7.1 -7.1 -5.8 -2.5 -2.6 -0.3 1987 0.6 0.7 0.3 -3.3 -4.9 -7.7 -14.1 -5.6 -6.7 -2.5 -0.3 0.7 1988 1.0 2.2 -0.1 -1.2 -2.0 -7.2 -5.5 -9.4 -3.9 -3.4 -1.6 0.2 1989 1.2 2.1 2.0 -4.5 -1.3 -2.1 -1.1 -2.2 -3.2 -0.8 0.0 1.0 1990 2.2 2.8 1.1 -4.2 -5.0 -4.4 -5.4 -5.2 -3.1 -2.4 -1.2 0.2 1991 2.0 0.9 -0.2 -2.3 -6.9 -9.3 -6.5 -7.3 -3.6 -3.7 -0.9 -0.3 1992 1.6 1.0 -1.1 -0.9 -8.2 -8.2 -8.0 -5.2 -2.6 -3.3 -0.5 1.9 1993 1.7 1.8 -0.2 -1.5 -2.8 -4.0 -3.3 -3.8 -3.7 -2.0 -0.5 0.2 1994 1.5 1.2 0.5 -1.6 -4.1 -3.7 -9.8 -4.1 -3.5 -5.9 -0.4 0.2 1995 1.5 1.5 0.0 -1.7 -2.3 -6.2 -12.3 -11.0 -6.9 -1.9 -1.4 0.3 1996 1.3 1.7 0.5 -1.8 -2.9 -5.1 -4.0 -4.8 -2.7 -2.3 -1.3 -0.1 1997 1.4 1.5 1.1 -2.0 -1.8 -4.9 -6.2 -5.5 -7.3 -3.4 -2.9 0.1 1998 1.7 1.8 0.7 0.8 -2.0 -1.4 -5.2 -7.1 -8.7 -2.4 -1.0 -0.1 1999 1.2 0.9 0.8 0.1 -1.2 -3.9 -3.7 -5.4 -5.8 -2.1 -0.3 0.4 2000 1.3 1.3 0.5 -0.1 -1.3 -2.3 -3.3 -6.5 -6.1 -2.3 -1.5 0.0 2001 0.8 0.2 -0.2 -3.1 -1.4 -5.5 -6.7 -2.5 -2.8 -0.9 -0.3 0.9 2002 1.8 2.0 -0.2 0.0 -5.8 -9.2 -6.6 -4.4 -3.4 -5.9 -1.8 0.1 2003 1.2 1.7 -0.5 -0.7 -2.6 -7.4 -5.5 -2.1 -3.2 -2.5 -2.0 -1.3 2004 1.2 1.2 0.2 -2.0 -2.3 -2.8 -3.8 -4.6 -4.4 -3.1 -0.8 0.2 2005 1.2 1.9 -0.2 -1.4 -3.8 -7.4 -6.1 -3.8 -2.6 -1.5 -0.6 -0.2 2006 1.9 1.6 1.9 -0.9 -1.0 -4.4 -4.5 -8.6 -4.8 -1.8 -0.9 0.5 2007 1.3 1.2 -1.1 -4.3 -4.7 -6.9 -11.1 -5.4 -3.6 -4.2 -2.0 0.1 2008 0.9 1.3 0.3 -2.4 -2.2 -4.0 -3.7 -5.5 -1.7 -1.8 -0.6 0.7 2009 1.7 1.3 1.1 -2.0 -3.3 -6.8 -8.8 -8.9 -5.0 -3.1 -2.6 -0.3 2010 - -0.3 -0.7 - -3.0 -2.4 - -4.8 - - 0.0 -0.4 2011 0.9 1.8 - -4.8 -3.1 -7.9 - - -6.8 -2.2 - 0.8 2012 1.1 0.7 0.7 -4.5 -3.3 -6.9 -5.6 -4.9 -6.1 -4.1 -2.0 -1.3 2013 0.2 0.5 0.6 0.6 -3.8 -4.0 -6.6 -8.7 -5.4 -2.7 -2.1 -1.5 2014 -0.1 -0.3 -1.3 -1.5 -3.2 -4.4 -3.3 -5.7 -4.7 -2.7 -2.5 -0.6 2015 0.3 0.8 0.2 -0.6 -2.6 -7.3 -7.6 -6.8 - -3.1 -2.0 - 2016 - 0.4 0.6 - -2.3 -1.9 - -6.4 - - - - 2017 - 1.5 0.8 -1.9 -2.4 -6.2 -4.3 -5.9 -4.7 -3.0 -1.6 - 2018 1.1 1.8 0.7 -0.9 -2.4 -4.9 -3.1 -4.4 -3.5 -2.3 -0.8 0.6 2019 0.7 0.1 0.3 -1.1 -4.0 -4.4 -4.4 -4.8 -4.5 -3.5 -0.6 0.1 2020 2.1 2.1 0.6 -0.9 -2.4 -3.2 -3.8 -7.9 -5.1 -3.0 -0.7 0.3 2021 1.4 1.7 1.0 -0.8 -3.0 -2.8 -4.4 -5.0 -1.9 -1.2 -0.5 0.4 2022 0.8 0.7 -0.5 -2.1 -3.8 -3.9 -4.9 -3.4 -2.6 - -0.5 0.0 2023 1.6 1.1 0.5 -0.9 -1.3 -4.9 -3.7 -4.9 -6.3 -4.1 -2.0 -1.2 2024 -2.4 -1.8 -0.2 -1.2 - - - - - - - -