1991-2020 Degrees Fahrenheit 1 58.8 57.9 0.9 53 24 1958 1974 1960 1956 top-third 2 54.0 53.9 0.1 47 30 1958 2017 1960 1957 normal 2023 3 49.7 51.3 -1.6 28 48 1978 2000,2017 1960 1957 normal 1963,1977 4 47.7 50.2 -2.5 13 62 1978 2000 1960 1959 bottom-third 1985 5 49.7 51.2 -1.5 21 54 2001 2000 1960 1957 bottom-third 1969,1970,1983 6 53.0 53.8 -0.8 27 48 1977 2017 1960 1957 normal 1996,2021 7 56.8 57.1 -0.3 33 42 1977,2010 2017 1960 1957 normal 8 60.3 60.4 -0.1 35 40 1977 2000,2017 1960 1957 normal 1967,1990 9 63.1 63.1 0.0 37 38 1977 2017 1960 1957 normal 1951,2018 10 65.3 64.9 0.4 50 25 1977 2017 1960 1957 top-third 2009 11 66.1 65.7 0.4 52 23 1977 1999 1960 1957 top-third 1971,1982,2011,2019 12 66.2 65.7 0.5 52 23 1977 2012 1960 1957 top-third 1974 18 60.9 61.7 -0.8 20 53 1959,1960 2023 1960 1957 bottom-third 1974,1979,2003 24 65.2 65.7 -0.5 22 51 1978 2000 1960 1958 bottom-third 1968,1974,1976,1986,2003 36 65.1 65.7 -0.6 18 53 1960 1955,1957 1960 1959 bottom-third 1969,1975,1984 48 64.8 65.6 -0.8 6 63 1996 1955 1961 1960 bottom-tenth 1980,1997 60 65.4 65.6 -0.2 22 45 1996 1957 1961 1960 bottom-third 1972,1975,1984,1999