1991-2020 Degrees Fahrenheit 1 37.5 39.4 -1.9 54 76 1929 1991 1996 2005 normal 2 39.8 37.8 2.0 115 15 1929 1953 2005 1999 top-third 1999 3 37.2 36.8 0.4 93 33 1929 1958 2004 2005 top-third 2021 4 38.0 38.0 0.0 82 44 1937 1967 2004 2005 normal 5 41.1 40.9 0.2 87 37 1937 1967,2016 2004 2005 top-third 1978,2004 6 44.8 45.1 -0.3 74 49 1937 1967 2001 2005 normal 1919 7 49.1 49.4 -0.3 78 45 1979 2015 2001 2005 normal 1905,1978 8 52.6 52.7 -0.1 84 39 1949 2015 2001 2005 top-third 1935,1966,2008 9 53.9 54.3 -0.4 75 48 1913,1917 2016 2001 2005 normal 1919,1971 10 54.5 54.8 -0.3 78 45 1917 2016 2001 2005 normal 1948,1954,1971 11 54.4 54.5 -0.1 85 38 1917 2016 2003 2005 top-third 1927,1948,1974,2000,2003,2019,2023 12 53.8 53.8 0.0 92 31 1949 2016 2003 2005 top-third 1948,2023 18 51.1 50.9 0.2 99 21 1917 2016 2003 2005 top-third 1926,1982,1992,2021,2023 24 54.3 53.8 0.5 109 11 1956 2016 2004 2005 top-tenth 1988,1991,2000 36 54.3 53.8 0.5 111 7 1957 2016,2017 2005 2000 top-tenth 1941,2000 48 54.0 53.8 0.2 104 12 1913 2016,2018 2004 2005 top-tenth 1990 60 54.1 53.8 0.3 106 8 1917 2017,2019 2005 1992 top-tenth 1991,1992,2008