1901-2000 Degrees Fahrenheit 1 57.2 59.9 -2.7 16 113 1907 1896 2018 2019 bottom-third 1973,2000 2 57.7 55.6 2.1 101 28 1960 2012 2019 2017 top-third 3 53.8 51.5 2.3 107 22 1958 2012 2019 2017 top-third 1955 4 51.8 48.7 3.1 117 12 1978 2017 2019 2017 top-tenth 5 51.0 47.4 3.6 124 4 1978 2017 2019 2017 top-tenth 1957 6 50.2 47.8 2.4 116 12 1978 2017 2019 2017 top-tenth 1938,1995,2002 7 52.1 49.7 2.4 120 8 1978 2017 2019 2017 top-tenth 1972 8 55.4 52.6 2.8 123 5 1977 2017 2019 2017 top-tenth 9 57.9 55.4 2.5 123 5 1977 2017 2019 2017 top-tenth 1927 10 60.0 57.7 2.3 123 5 1977 2017 2019 2017 top-tenth 1922,1927 11 61.4 59.4 2.0 121 7 1977 2017 2019 2017 top-tenth 1927,2016 12 62.2 60.1 2.1 123 5 1977 2017 2019 2017 top-tenth 18 57.8 56.0 1.8 123 4 1978 2017 2019 2017 top-tenth 1999 24 62.0 60.1 1.9 124 3 1978 2017 2019 2017 top-tenth 36 61.2 60.1 1.1 116 10 1970,1979 2018 2016 2019 top-tenth 1954 48 61.9 60.1 1.8 124 1 1980 2020 2019 2020 highest 60 61.9 60.1 1.8 123 1 1980 2020 2019 2020 highest