1991-2020 Degrees Fahrenheit 1 31.5 34.3 -2.8 32 53 1977 2023 1965 1964 normal 2 35.7 37.2 -1.5 45 40 1977 2016 1965 1960 normal 1985 3 39.1 41.0 -1.9 38 47 1977 2016 1965 1960 normal 1942,1987 4 43.3 45.7 -2.4 28 57 1977 2016 1965 1964 bottom-third 1971,2004 5 48.4 50.6 -2.2 28 56 1977 2016 1965 1964 bottom-third 1964,1996 6 52.8 55.1 -2.3 25 59 1977 2016 1965 1962 bottom-third 1951,1955,1969,1973,1990 7 56.0 58.5 -2.5 21 63 1977 2016 1965 1964 bottom-third 1951,1964,1987 8 57.9 60.3 -2.4 21 63 1977 2016 1965 1964 bottom-third 1964,1987,1988 9 58.7 60.6 -1.9 28 56 1977 2016 1965 1962 bottom-third 1987 10 57.8 59.9 -2.1 25 59 1941 2016 1965 1962 bottom-third 11 56.1 58.4 -2.3 19 65 1941 2017 1963 1965 bottom-third 1976,1985 12 54.2 56.5 -2.3 18 66 1941 2017 1965 1965 bottom-third 1965,1969 18 53.5 56.0 -2.5 18 65 1964,1979 2017 1964 1965 bottom-third 1963 24 54.2 56.5 -2.3 20 63 1969 2017,2022 1965 1962 bottom-third 1943 36 54.1 56.4 -2.3 18 64 1970 2023 1965 1962 bottom-third 1944 48 53.8 56.4 -2.6 4 77 1944 2023 1964 1965 bottom-tenth 1945,1946,1948,1964,1981,1982 60 54.0 56.3 -2.3 11 69 1945 2021,2023 1965 1964 bottom-third 1949,1969,1972,1983