1991-2020 Degrees Fahrenheit 1 38.6 43.5 -4.9 2 73 1969 2015 1969 1968 bottom-tenth 2 45.0 49.5 -4.5 1 74 1970 2015 1970 1969 lowest 3 51.2 54.0 -2.8 2 73 1976 2015 1970 1969 bottom-tenth 1986 4 54.6 56.8 -2.2 6 69 1976 2015 1968 1969 bottom-tenth 1974 5 55.0 57.5 -2.5 2 73 1976 2015 1970 1969 bottom-tenth 1986 6 54.2 56.5 -2.3 8 67 1971,1975,1976 2022 1968 1969 bottom-third 1982,1995 7 51.5 54.5 -3.0 2 73 1975 2020 1968 1969 bottom-tenth 1968 8 48.6 52.0 -3.4 1 74 1970,1975 2020 1970 1969 lowest 1975 9 46.2 48.9 -2.7 11 64 1984 2020 1968 1969 bottom-third 10 43.2 45.7 -2.5 14 61 1984 2015 1968 1969 bottom-third 1955,1993,2008 11 41.0 43.1 -2.1 15 58 1979,1984 2018 1968 1969 bottom-third 1961 12 40.0 42.0 -2.0 17 56 1973 2018 1968 1969 bottom-third 1962,1974 18 45.0 46.8 -1.8 16 57 1973 2018 1968 1969 bottom-third 1953,1960,1962 24 40.3 42.0 -1.7 23 48 1993 2018 1969 1967 bottom-third 36 39.7 41.9 -2.2 11 58 1975 2018 1966 1969 bottom-third 1965,1985 48 40.1 41.8 -1.7 17 50 1976 2020,2021 1968 1969 bottom-third 1978,1980,1987 60 40.2 41.7 -1.5 19 46 1977 2022 1969 1967 bottom-third 1953,1964,1967,1972