1991-2020 Degrees Fahrenheit 1 32.9 35.6 -2.7 33 51 1979 2017 1972 1971 normal 2 33.3 34.5 -1.2 48 36 1978 2023 1972 1960 normal 1993 3 35.3 35.8 -0.5 53 31 1977 2016 1971 1972 normal 4 37.2 38.6 -1.4 43 40 1977 2016 1971 1972 normal 5 40.1 42.4 -2.3 28 55 1977 2016 1970 1972 normal 1987,2001 6 44.9 46.9 -2.0 31 52 1977 2016 1970 1972 normal 1951,1993 7 49.2 51.2 -2.0 33 50 1977 2016 1970 1972 normal 2015 8 52.6 54.5 -1.9 31 52 1977 2016 1970 1972 normal 1981 9 54.3 56.6 -2.3 20 62 1977 2016 1970 1972 bottom-third 1942,1965 10 55.2 57.3 -2.1 22 60 1977 2016 1970 1972 bottom-third 1957,1958 11 54.6 57.0 -2.4 19 63 1977 2016 1970 1972 bottom-third 1979 12 53.4 55.9 -2.5 18 63 1963 2017 1970 1972 bottom-third 18 51.5 52.9 -1.4 42 38 1978 2017 1971 1972 normal 1996 24 54.3 55.8 -1.5 31 47 1964 2017 1971 1972 normal 36 54.3 55.8 -1.5 28 47 1963 2018 1972 1956 normal 1952,1985,1986 48 53.9 55.7 -1.8 14 58 1964 2023 1971 1972 bottom-third 1981 60 53.8 55.7 -1.9 11 58 1965,1970 2020 1972 1959 bottom-third 1959,1980