1901-2000 Degrees Fahrenheit 1 50.7 51.2 -0.5 56 74 1978 2018 2015 2020 normal 2 50.9 49.8 1.1 84 46 1978 1950 2016 2020 normal 1998 3 50.3 49.7 0.6 74 55 1978 1932 2015 2020 normal 4 53.3 51.3 2.0 101 28 1977 1932 2015 2020 top-third 1962 5 56.7 54.2 2.5 108 21 1977 1932 2018 2020 top-third 6 60.0 57.8 2.2 107 22 1977 1932 2018 2020 top-third 1934 7 63.1 61.0 2.1 113 16 1977 1932 2018 2020 top-third 1916,2016,2023 8 65.5 63.5 2.0 116 13 1977 1932 2018 2020 top-tenth 1957,2016 9 67.0 65.2 1.8 113 16 1977 1932 2018 2020 top-third 1923,2016 10 67.5 65.9 1.6 108 21 1977 1932 2018 2020 top-third 1903 11 67.3 65.8 1.5 109 20 1977 1932,2017 2018 2020 top-third 1903,1909,2012 12 67.4 65.1 2.3 124 5 1977 2017 2019 2020 top-tenth 1999,2019 18 65.4 62.7 2.7 125 3 1977,1978 2017 2019 2020 top-tenth 24 67.5 65.1 2.4 126 2 1978 2017 2020 2020 top-tenth 2020 36 67.5 65.1 2.4 126 1 1970,1978 2021 2020 2021 highest 48 67.2 65.1 2.1 121 5 1970 2020 2018 2020 top-tenth 60 67.4 65.1 2.3 124 1 1970,1971 2020,2021 2020 2020 highest 2020