1991-2020 Degrees Fahrenheit 1 41.8 45.0 -3.2 71 54 1948 2017 1980 1978 normal 2 38.8 40.1 -1.3 91 34 1933 2017 1980 1978 top-third 1921,1998 3 37.4 36.0 1.4 111 14 1917 2015,2017 1980 1934 top-third 4 37.6 34.0 3.6 119 5 1917 2015 1980 1981 top-tenth 5 38.1 35.1 3.0 121 3 1917 2017 1980 1981 top-tenth 6 40.4 38.1 2.3 120 4 1917 2017 1980 1981 top-tenth 1986 7 44.0 42.3 1.7 119 5 1917 2017 1980 1981 top-tenth 1996 8 47.6 46.5 1.1 116 8 1917 2017 1980 1934 top-tenth 1934,2000 9 50.8 50.1 0.7 113 11 1917 2017 1980 1978 top-tenth 1978,2021,2022 10 52.9 52.4 0.5 112 12 1917 2017 1980 1978 top-tenth 1986,2000,2005,2019 11 53.3 53.3 0.0 103 21 1917 2017 1980 1978 top-third 2006 12 53.0 53.2 -0.2 103 21 1913 2017 1980 1978 top-third 2000,2007,2016,2023 18 47.6 48.2 -0.6 95 28 1913 2018 1980 1978 top-third 1987,2008 24 52.5 53.2 -0.7 94 29 1913 2018 1980 1935 top-third 1987,1990 36 51.1 53.1 -2.0 78 44 1914 2019 1979 1980 normal 1972,1989 48 51.9 53.1 -1.2 90 31 1920 2018 1980 1981 top-third 1993 60 51.5 53.0 -1.5 84 36 1917 2019 1980 1938 top-third 1938,1989