Davis 00Z 850hPa temperature 1959 - - - -18.8 -18.1 -18.7 -21.3 -22.3 -23.3 -18.7 -14.3 -9.9 1960 -8.4 -9.9 -16.4 -19.6 -20.4 -21.8 -22.8 -19.8 -20.6 -19.9 -13.4 - 1961 - -9.7 -14.2 -15.6 -16.3 -18.8 -18.1 -20.2 -18.5 -18.4 -13.4 -11.1 1962 -11.3 -11.2 -14.3 -17.6 -21.5 -18.8 -22.3 -23.2 -22.3 -18.4 -13.7 -10.7 1963 -8.5 -12.9 -16.3 -18.4 -20.0 -18.4 -21.1 -17.8 -19.1 -21.7 -13.4 -10.1 1964 -9.2 -11.4 -16.3 -19.2 -20.2 -18.4 -19.1 -19.5 -23.5 -18.7 - - 1965 - - - - - - - - - - - - 1966 - - - - - - - - - - - - 1967 - - - - - - - - - - - - 1968 - - - - - - - - - - - - 1969 - - - -17.8 -20.3 - -21.7 -26.9 -21.2 -18.7 -14.4 -9.4 1970 -9.1 -12.1 -13.3 -16.5 -15.7 -19.1 -21.2 -20.7 -20.1 -18.4 -13.6 -9.0 1971 -7.5 -10.8 -14.4 -16.7 -17.6 -18.6 -21.1 -18.7 -19.5 -17.4 -14.7 -8.5 1972 -6.9 -11.5 -14.7 -16.6 -21.8 -18.3 -20.1 -16.4 -21.4 -19.5 -13.4 -10.1 1973 -9.1 -12.0 -17.5 -17.4 -17.2 -17.7 -22.5 -21.1 -17.1 -17.4 -11.8 -10.5 1974 -6.9 -10.8 -15.7 -16.7 -20.9 -17.5 -20.0 -18.9 -22.6 -14.9 -12.5 -7.3 1975 -7.2 -11.6 -14.8 -17.4 -16.6 -18.6 -20.3 -22.2 -22.1 -19.0 -11.5 -9.9 1976 -7.9 -10.8 -16.4 -17.4 -20.7 -19.3 -21.1 -23.9 -22.5 -16.4 -13.2 -7.5 1977 -6.4 -11.5 -16.0 -18.8 -19.5 -18.9 -20.7 -19.0 -24.3 -18.9 -14.4 -9.6 1978 -9.7 -11.1 -14.6 -17.5 -19.2 -18.3 -19.5 -23.9 -21.2 -21.8 -13.3 -9.6 1979 -8.3 -11.7 -15.2 -16.6 -18.5 -20.4 -20.5 -21.9 -20.0 -18.6 -11.9 -8.7 1980 -7.9 -11.1 -13.5 -15.6 -21.7 -21.1 -16.1 -19.4 -19.6 -18.8 -11.5 -8.9 1981 -9.3 -11.3 -14.5 -18.8 -19.2 -19.3 -18.9 -17.3 -20.2 -20.3 -12.9 -9.0 1982 -9.8 -11.6 -18.7 -22.2 -19.6 -22.6 -18.6 -26.5 -25.0 -18.1 -13.1 -7.3 1983 -8.2 -11.2 -15.4 -16.0 -18.4 -19.3 -23.8 -20.3 -18.2 -20.4 -15.9 -10.2 1984 -8.0 -11.5 -14.3 -15.9 -17.1 -20.7 -22.3 -19.7 -19.1 -22.3 -13.8 -8.8 1985 -7.6 -12.5 -14.3 -16.3 -20.1 -17.1 -24.7 -21.2 -21.2 -20.1 -13.5 -10.9 1986 -9.7 -8.1 -14.5 -16.9 -17.5 -21.2 -21.3 -20.4 -18.6 -17.0 -13.7 -9.7 1987 -7.9 -10.8 -15.8 -18.0 -21.8 -17.2 -18.5 -23.3 -22.5 -17.7 -13.5 -8.6 1988 -8.2 -12.5 -13.4 -15.4 - -17.9 -20.6 -17.5 -19.8 -17.8 -15.4 -10.8 1989 -9.9 -11.4 -17.9 -20.3 -21.4 -17.9 -20.4 -17.7 -16.6 -15.4 -14.9 -8.2 1990 -7.9 -10.9 -14.3 -14.3 -16.7 -19.8 -16.8 -20.9 -20.4 -18.3 -12.8 -8.6 1991 -9.2 -10.2 -14.3 -14.6 -18.3 -16.0 -15.4 -18.1 -21.6 -18.5 -13.7 -7.3 1992 -8.0 -11.1 -14.8 -21.1 -16.7 -20.5 -21.7 -19.3 -24.2 -17.8 -13.2 -12.2 1993 -6.9 -10.2 -16.2 -19.4 -24.8 -21.3 -21.1 -23.8 -22.9 -18.7 -14.9 -11.0 1994 -9.9 -11.5 -15.1 -21.4 -21.0 - -18.2 -23.5 -18.1 -17.3 -14.5 -9.4 1995 -9.4 -11.5 -15.4 -16.6 -19.9 -19.5 -14.0 -20.7 -20.3 -20.1 -13.6 -10.0 1996 -8.5 -10.8 -14.7 -17.9 -21.9 -17.5 -19.3 -17.9 -19.2 -18.0 -12.9 -9.9 1997 -9.6 -10.9 -12.8 -19.8 -19.8 -17.9 -20.7 -21.3 -22.0 -18.6 -13.8 -8.4 1998 -9.4 -11.4 -16.8 -22.6 -19.3 -19.4 -21.5 -18.7 -20.6 -19.3 -13.1 -9.4 1999 -9.9 -12.3 -14.3 -18.5 -20.7 -19.2 -21.5 -20.9 -22.3 -17.6 -14.5 -10.5 2000 -10.1 -11.8 -14.3 -15.5 -19.7 -19.2 -20.1 -20.1 -19.2 -22.5 -12.1 -9.7 2001 -8.2 -10.7 -14.7 -17.3 -17.7 -21.0 -19.5 -22.9 -21.4 -17.8 -12.9 -9.1 2002 -7.6 -11.5 -14.0 -15.0 -15.7 -17.6 -18.6 -22.4 -19.6 -17.8 -13.3 -10.1 2003 -7.8 -8.9 -14.0 -17.2 -19.2 -18.7 -20.3 -21.0 -18.8 -18.9 -13.7 -8.7 2004 -7.3 -9.3 -14.8 -18.1 -16.9 -20.2 - -21.1 -22.1 -17.1 -12.7 -7.9 2005 -8.0 -11.7 -13.7 -20.3 -19.5 -18.8 -21.1 -21.8 -20.1 -17.2 -13.5 -7.5 2006 -8.5 -12.8 -14.0 -14.6 -22.2 -19.9 -21.8 -19.3 -21.4 -18.5 -12.0 -9.9 2007 -8.8 -10.4 -14.5 -16.4 -14.8 -17.7 -17.7 -18.3 -20.1 -18.5 -11.7 -10.4 2008 -10.3 -11.4 -15.3 -16.8 -17.1 -21.8 -17.7 -22.2 -22.7 -20.6 -12.6 -8.9 2009 -7.8 -9.2 -14.4 -17.9 -17.0 -16.4 -17.8 -21.2 -18.6 -17.5 -13.9 -9.3 2010 -7.5 -11.4 -14.5 -18.5 -20.6 -18.7 -23.9 -23.5 -17.0 -18.2 -14.5 -10.1 2011 -7.6 -13.7 -14.4 -16.3 -19.4 -20.1 -15.9 -23.2 -19.6 -20.0 -12.8 -9.9 2012 -8.6 -10.9 -15.9 -16.7 -19.9 -19.0 -22.9 -21.4 -20.9 -16.4 -12.5 -8.1 2013 -7.6 -10.6 -18.1 -18.5 -19.3 -19.0 -19.8 -22.2 -15.2 -16.4 -12.2 -9.3 2014 -7.5 -10.7 -15.7 -20.3 -16.9 -22.0 -21.2 -21.2 -19.2 -17.7 -11.8 -9.9 2015 -9.3 -11.0 -14.7 - - - - - - -19.4 -12.9 -8.7 2016 -9.1 -11.8 -16.4 -18.9 -19.1 -22.2 -21.6 -19.4 -23.0 -17.4 -11.6 -9.0 2017 -8.0 -10.2 -16.5 -20.7 -17.2 -22.0 -18.7 -20.6 -21.5 -20.8 -12.1 -9.7 2018 -8.0 -10.2 -15.9 -14.5 -18.9 -17.9 -17.8 -17.9 -20.7 -19.5 -14.1 -9.3 2019 -8.4 -9.8 -13.5 -17.5 -20.4 -19.7 -18.7 -18.4 -20.3 -18.0 -12.5 -8.9 2020 -6.9 -10.7 -16.1 -15.7 -17.1 -17.6 -17.6 -17.3 -17.3 -16.7 -11.7 -10.2 2021 -9.3 -11.3 -14.7 -17.0 -20.9 -20.4 -19.6 -17.4 -18.4 -14.8 -13.6 -8.7 2022 -9.2 -10.7 -14.0 -18.0 -17.7 -16.0 -18.5 -19.5 -18.6 -15.9 -13.9 -9.5 2023 -9.5 -10.5 -14.0 -16.2 -20.7 -18.4 -23.0 -25.2 -17.3 -18.0 -13.7 -9.9 2024 -8.5 -11.3 -14.7 -18.7 - - - - - - - -