1991-2020 Degrees Fahrenheit 1 59.6 64.2 -4.6 16 77 1976 1973 1943 1946 bottom-third 2 68.0 69.0 -1.0 50 38 1976 2016 1941 1934 normal 1990,2008 3 72.5 73.3 -0.8 53 35 1976 2016 1941 1934 normal 1954,1960,1990,2012,2022 4 75.4 76.5 -1.1 40 48 1976 2016 1941 1941 normal 1941,1949 5 77.2 78.3 -1.1 35 52 1976 2016 1940 1941 normal 1991,2008 6 78.2 79.2 -1.0 36 51 1976 2016 1941 1941 normal 1934,1941,1953,1981,1991,2001 7 78.0 79.1 -1.1 37 50 1976 1998 1941 1933 normal 1950,1973,1980,1982,2014 8 77.1 78.2 -1.1 39 47 1976 2011 1941 1933 normal 1955,1988,2014 9 74.8 76.8 -2.0 19 67 1976 2011 1941 1941 bottom-third 1941,1993 10 72.3 75.1 -2.8 11 74 1940 2017 1940 1941 bottom-third 1966 11 70.5 73.3 -2.8 12 72 1940 2017 1940 1941 bottom-third 12 69.5 72.0 -2.5 16 68 1940 2017 1940 1941 bottom-third 18 -99 74.4 -99 -99 -99 1940 2017 normal 24 -99 72.0 -99 -99 -99 1979 2017 normal 36 -99 72.0 -99 -99 -99 1979 2017,2018 normal 48 -99 72.0 -99 -99 -99 1979 2018,2019,2020 normal 60 -99 72.0 -99 -99 -99 1979,1980 2020 normal