1991-2020 Degrees Fahrenheit 1 48.9 51.2 -2.3 28 52 1976 1985 1951 1952 normal 2 55.0 56.3 -1.3 31 49 1976 1985 1952 1949 normal 1956,1959,1995,2014 3 60.3 61.7 -1.4 35 45 1976 2016 1952 1946 normal 1960,2013 4 64.5 65.9 -1.4 32 48 1976 2007 1952 1945 normal 1960,1965,2014 5 67.5 68.8 -1.3 44 36 1967 2016 1952 1949 normal 1978,1980,1989,2008 6 68.7 70.0 -1.3 39 41 1967 2010 1952 1949 normal 1971 7 69.3 69.8 -0.5 53 26 1967 2010 1952 1953 top-third 8 68.0 68.7 -0.7 53 26 1967 2010 1952 1953 top-third 1995,2008,2014 9 66.0 66.8 -0.8 48 31 1967 2010 1952 1945 normal 1993 10 63.9 64.6 -0.7 52 27 1967 2016 1952 1945 normal 11 62.2 62.5 -0.3 54 25 1967 2017 1952 1949 top-third 1949 12 60.4 61.0 -0.6 52 27 1967 2016 1952 1949 normal 18 63.0 64.0 -1.0 49 30 1967 2017 1952 1949 normal 1994,2013 24 60.1 61.0 -0.9 50 28 1967 2017 1952 1950 normal 1950,1995,2001,2004 36 59.6 60.9 -1.3 36 41 1969 2017,2018 1952 1951 normal 1951,1996,1997 48 59.6 60.9 -1.3 35 41 1969 2019 1951 1952 normal 1989,1997 60 59.8 60.8 -1.0 43 32 1967 2020 1952 1953 normal 1989