1991-2020 Degrees Fahrenheit 1 38.0 38.7 -0.7 59 43 1960 2012 1996 1995 normal 2 36.4 34.6 1.8 89 13 1934 2012 1996 1991 top-third 1945,2010 3 33.0 32.4 0.6 78 22 1978 2012,2020 1996 1991 top-third 4 33.5 32.6 0.9 81 19 1978 2012 1996 1991 top-third 5 34.1 34.5 -0.4 68 30 1934 2012 1996 1995 top-third 6 36.9 37.5 -0.6 66 31 1934 2012 1996 1995 top-third 7 40.7 41.3 -0.6 65 32 1934 2012 1996 1995 top-third 1942 8 44.4 45.1 -0.7 65 32 1963 2012 1996 1995 top-third 9 47.2 48.3 -1.1 62 35 1963 2012 1996 1995 normal 1942,1989 10 49.3 50.3 -1.0 62 35 1963 2012 1996 1995 normal 2009 11 49.9 51.2 -1.3 59 38 1941 2012 1996 1995 normal 1972,1981 12 49.7 51.1 -1.4 55 42 1941 2012 1996 1995 normal 18 44.5 46.5 -2.0 30 63 1941 2017 1994 1996 bottom-third 1947,1993 24 49.3 51.0 -1.7 35 58 1926,1941 2017,2021 1994 1996 normal 1939,1949,1957,1972,1973 36 50.0 51.0 -1.0 57 32 1941,1979 2022 1996 1993 normal 1932,1976,1986,1987 48 49.7 50.9 -1.2 44 42 1980 2023 1996 1995 normal 1989,1994 60 49.3 50.9 -1.6 27 56 1944 2023 1984 1996 bottom-third 1934,1935,1977,1984