1991-2020 Degrees Fahrenheit 1 49.3 47.3 2.0 67 16 1976 1975 1962 1948 top-third 2 53.9 52.6 1.3 68 15 1976 1975 1962 1946 top-third 1970 3 57.3 58.4 -1.1 37 46 1976 2015 1962 1961 normal 1949,1994,2008 4 61.1 62.9 -1.8 25 58 1940 2005,2015 1962 1961 bottom-third 5 64.3 66.1 -1.8 20 63 1940 2016 1962 1961 bottom-third 1944,1951,1957,1984,1987 6 65.5 67.3 -1.8 18 64 1976,1992 2010,2020 1962 1961 bottom-third 1943,1946,1951,1979,1986 7 65.0 66.8 -1.8 13 69 1967 2015 1962 1961 bottom-third 8 63.5 65.3 -1.8 18 64 1967 2010 1962 1961 bottom-third 1988 9 61.4 62.8 -1.4 24 57 1967 2010 1962 1961 bottom-third 1948,1951 10 58.0 60.1 -2.1 13 68 1967 2010,2012,2016 1962 1961 bottom-third 1966 11 55.4 57.7 -2.3 12 69 1967,1978 2012,2020 1962 1961 bottom-third 1948,1965 12 53.4 56.1 -2.7 6 75 1978 2016 1962 1962 bottom-tenth 1956,1962,1984 18 57.0 59.8 -2.8 2 77 1978 2016 1963 1962 bottom-tenth 24 53.4 56.1 -2.7 2 76 1978 2017 1963 1962 bottom-tenth 1982 36 53.5 56.0 -2.5 1 74 1963 2021,2022 1963 1962 lowest 48 53.8 56.0 -2.2 3 69 1964,1965 2022 1963 1958 bottom-tenth 1967,1981 60 -99 56.0 -99 -99 -99 1965,1967,1982 2020 normal