Davis 12Z 700hPa temperature 1971 - - - - - - - - - -22.6 -21.6 -14.9 1972 -14.1 -18.6 -21.2 - - - - - - - - -18.0 1973 -16.6 -18.2 -21.5 - - - - - - -21.6 -19.3 -20.9 1974 -18.4 -18.1 -21.7 - - - - - - -21.6 -19.0 -14.8 1975 -15.1 -18.2 -20.8 - - - - - - - -19.4 -17.6 1976 - -18.5 -21.9 - - - - - - -23.4 -19.5 -15.0 1977 -15.0 -17.1 -23.0 - - - - - - -25.3 -21.0 -18.4 1978 -19.5 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - -21.1 -23.8 -25.0 -23.8 -23.5 -22.8 -21.9 -21.4 -20.8 -15.4 1990 -14.6 -17.4 -21.3 -19.2 -22.5 -25.0 -20.6 -25.5 -26.3 -22.8 -18.9 -17.0 1991 -17.3 -16.6 -18.1 -21.2 -21.9 -21.1 -19.5 -23.2 -24.1 -24.2 -20.2 -15.5 1992 -16.6 -17.4 -20.7 -22.5 -21.9 -22.6 -25.3 -25.3 -27.8 -23.5 -18.9 -20.0 1993 -13.8 -18.4 -21.1 -23.3 -29.2 -24.7 -26.3 -26.0 -25.9 -23.0 -21.5 -18.7 1994 -17.9 -18.4 -21.3 -21.6 -24.9 - -22.3 -25.1 -23.5 -23.1 -19.8 -18.2 1995 -17.2 -17.5 -20.3 -20.0 -23.2 -23.4 -21.0 -25.8 -25.5 -24.4 -19.3 -17.8 1996 -16.3 -16.8 -20.8 -22.3 -26.5 -22.7 -25.2 -22.1 -22.8 -22.7 -20.1 -17.0 1997 -17.5 -18.0 -20.0 -22.3 -23.4 -22.9 -25.7 -24.8 -27.6 -23.2 -20.2 -15.5 1998 -17.1 -16.8 -19.8 -25.5 -22.8 -23.6 -24.0 -24.2 -24.2 -24.1 -19.8 -18.3 1999 -17.7 -17.6 -20.5 -23.7 -23.5 -22.0 -26.3 -25.4 -25.5 -23.7 -20.7 -18.8 2000 -16.7 -19.3 -20.9 -20.4 -24.4 -21.4 -25.4 -25.0 -23.2 -26.8 -18.6 -16.7 2001 -16.2 -17.5 -19.5 -23.1 -23.3 -24.7 -23.7 -26.0 -26.6 -23.4 -21.1 -17.0 2002 -16.8 -18.0 -19.9 -21.2 -19.8 -23.7 -23.4 -25.1 -23.7 -21.5 -20.2 -17.6 2003 -14.6 -16.9 -19.9 -23.2 -23.3 -23.8 -23.2 -25.2 -23.6 -24.4 -19.3 -15.6 2004 -15.5 -14.5 -19.9 -22.3 -22.7 -24.5 - -26.5 -26.2 -22.3 -19.4 - 2005 - - - - - - - - - - -19.7 -14.1 2006 -17.2 -18.8 - - - - - - - - -16.6 -18.3 2007 -16.1 -18.5 -21.8 -19.1 -20.8 -22.1 -23.1 -23.1 -25.1 -22.9 -18.3 -18.2 2008 -18.1 -18.9 - - - - - - - - - -15.4 2009 -15.6 -15.5 - - - - - - - - -17.1 -18.2 2010 -15.2 -16.7 -19.5 -22.5 -23.7 -24.6 -28.0 -26.6 -23.5 -24.4 -19.7 -18.6 2011 -14.6 -19.9 -20.1 -22.3 -22.9 -23.4 -21.6 -26.0 -24.0 -24.3 -18.0 -19.8 2012 -16.6 -16.8 -21.4 -21.4 -23.4 -23.7 -26.1 -25.0 -26.3 -23.0 - -15.9 2013 -14.8 - - - - - - - - - -16.7 -17.8 2014 -16.2 -18.7 -21.1 -24.2 -20.8 -25.0 -24.7 -25.5 -24.6 -22.5 -20.1 -18.6 2015 -16.5 - -20.9 -22.7 -26.1 -24.3 -25.7 -25.2 -25.2 -22.5 -18.2 -16.7 2016 -17.0 -19.2 - - - - - - - - -18.3 -17.1 2017 -16.5 -18.3 -22.2 -25.2 -21.8 -24.8 -22.8 -24.8 -26.3 -25.4 -17.9 -17.4 2018 -15.6 -17.3 -20.9 -19.6 -24.4 -21.8 -23.3 -21.9 -26.1 -23.6 -21.9 -17.7 2019 -15.8 -15.6 -20.2 -20.8 -23.6 -21.9 -24.1 -24.1 -25.3 -20.7 -18.5 -15.6 2020 -14.2 -17.9 -22.1 -21.5 -21.2 -21.5 -23.3 -22.4 -23.2 -22.1 -17.2 -17.7 2021 -16.9 -18.7 -19.7 -21.3 -24.2 -25.5 -24.4 -23.4 -23.8 -21.4 -20.2 -17.0 2022 -16.7 -18.4 -19.0 -21.8 -23.0 -20.0 -24.1 -23.6 -24.5 -21.5 -21.2 -17.9 2023 -17.5 -17.4 -17.3 -20.5 -23.3 -23.6 -23.6 -26.9 -21.7 -23.9 -21.9 -16.7 2024 -15.8 -18.6 -19.7 -22.2 - - - - - - - -