1991-2020 Degrees Fahrenheit 1 55.1 57.8 -2.7 26 56 1967 1977 2002 2003 bottom-third 2 50.8 51.5 -0.7 44 38 1947 1977 2003 2001 normal 1957,1990 3 45.1 45.0 0.1 57 25 1950 2012 2003 2001 top-third 2020 4 39.5 38.9 0.6 66 16 1950 2012 2003 2000 top-third 1946 5 33.8 34.4 -0.6 53 28 2014 2012 2003 2002 normal 1944 6 32.6 32.5 0.1 61 20 2014 2012 2003 2002 top-third 7 32.8 32.8 0.0 60 19 2014 2012 2003 2002 top-third 1981,1985 8 34.8 34.7 0.1 59 20 2014 2012 2003 2002 top-third 1954 9 37.7 37.7 0.0 60 19 1943 2016 2003 2002 top-third 1954 10 41.2 40.9 0.3 64 15 1943 2012 2003 2002 top-third 2020 11 43.9 43.6 0.3 65 14 1943 2012 2003 2002 top-third 1995,2005 12 45.7 45.6 0.1 61 18 1943 2012 2003 2002 top-third 1954 18 40.7 41.2 -0.5 52 26 1951 1999 1997 2003 top-third 1992 24 45.1 45.6 -0.5 55 21 1952,1979 2017 1997 2003 top-third 1985,1987,2020 36 46.0 45.6 0.4 61 13 1979 2000 2003 2002 top-third 48 45.7 45.6 0.1 56 16 1968 2001,2002 1999 2003 top-third 2020 60 46.1 45.6 0.5 63 7 1969 2002 2000 2003 top-tenth 2007,2008,2010,2016