1991-2020 Degrees Fahrenheit 1 40.1 38.7 1.4 79 23 1960 2012 2003 2002 top-third 2 34.8 34.6 0.2 70 32 1934 2012 2003 2002 top-third 1973 3 30.2 32.4 -2.2 42 58 1978 2012,2020 2003 2002 normal 1939,1964 4 30.6 32.6 -2.0 52 48 1978 2012 2003 2002 normal 1928,1946,1966 5 33.6 34.5 -0.9 62 36 1934 2012 2003 2002 normal 6 36.4 37.5 -1.1 59 38 1934 2012 2003 2002 normal 1928 7 40.4 41.3 -0.9 63 34 1934 2012 2003 2002 normal 8 44.6 45.1 -0.5 67 30 1963 2012 2003 2002 top-third 9 47.8 48.3 -0.5 71 26 1963 2012 2003 2002 top-third 1954,1983,1992 10 49.6 50.3 -0.7 66 31 1963 2012 2003 2002 top-third 11 50.2 51.2 -1.0 64 33 1941 2012 2003 2002 normal 1942,1990 12 50.0 51.1 -1.1 64 33 1941 2012 2003 2002 normal 1983,1986,2009 18 44.8 46.5 -1.7 37 56 1941 2017 1997 2003 normal 1939,1951,1988,1989 24 50.0 51.0 -1.0 60 33 1926,1941 2017,2021 1997 2003 normal 1953,1955,1995 36 50.8 51.0 -0.2 70 19 1941,1979 2022 2003 2002 top-third 1992,1999 48 50.3 50.9 -0.6 61 25 1980 2023 1999 2003 top-third 1999 60 50.6 50.9 -0.3 62 21 1944 2023 2001 2003 top-third 2000,2001