1991-2020 Degrees Fahrenheit 1 36.8 38.7 -1.9 44 58 1960 2012 1952 1953 normal 1930 2 36.0 34.6 1.4 85 17 1934 2012 1953 1953 top-third 1953 3 32.2 32.4 -0.2 68 32 1978 2012,2020 1950 1953 top-third 1933,1937,1992 4 32.7 32.6 0.1 74 26 1978 2012 1952 1953 top-third 5 34.2 34.5 -0.3 70 28 1934 2012 1952 1953 top-third 1985 6 37.5 37.5 0.0 70 27 1934 2012 1952 1953 top-third 1974 7 41.2 41.3 -0.1 71 26 1934 2012 1952 1953 top-third 1974 8 44.7 45.1 -0.4 69 28 1963 2012 1952 1953 top-third 1976 9 47.8 48.3 -0.5 71 26 1963 2012 1952 1953 top-third 1983,1992,2004 10 49.9 50.3 -0.4 70 27 1963 2012 1952 1953 top-third 11 50.8 51.2 -0.4 74 23 1941 2012 1953 1950 top-third 1950,1974,1976,1985 12 50.5 51.1 -0.6 70 27 1941 2012 1952 1953 top-third 1985 18 46.2 46.5 -0.3 70 23 1941 2017 1953 1950 top-third 1933,2009 24 50.6 51.0 -0.4 71 22 1926,1941 2017,2021 1953 1932 top-third 1932 36 50.2 51.0 -0.8 62 27 1941,1979 2022 1953 1954 top-third 1955 48 49.8 50.9 -1.1 50 36 1980 2023 1952 1953 normal 1932,1933,1952,1976,1995 60 50.0 50.9 -0.9 55 28 1944 2023 1953 1953 normal 1953,1956,1993