1991-2020 Degrees Fahrenheit 1 20.2 19.2 1.0 45 31 2019 1954 1962 1961 normal 2 11.1 17.6 -6.5 18 58 1950,1979 1992 1959 1962 bottom-third 1956 3 14.3 18.2 -3.9 27 48 1950,1979 1992 1962 1961 normal 1989,2019 4 19.3 21.1 -1.8 39 36 1979 2000 1962 1961 normal 5 25.0 25.6 -0.6 40 35 1979 2000 1962 1961 normal 6 30.1 31.0 -0.9 40 35 1979 2016 1962 1961 normal 1955,2023 7 35.4 36.3 -0.9 39 36 1952,1978 2016 1962 1961 normal 1975,2003 8 39.1 40.4 -1.3 32 43 1952,1979 2016 1962 1961 normal 9 41.7 42.8 -1.1 32 42 1952 2016 1962 1961 normal 10 42.7 43.7 -1.0 31 43 1952 2016,2022 1962 1961 normal 1977,2019 11 42.8 43.5 -0.7 35 39 1952 2016 1962 1961 normal 2003 12 41.0 42.4 -1.4 33 41 1952 2016 1962 1961 normal 18 35.9 38.6 -2.7 14 59 1952 2013 1957 1962 bottom-third 1970,1986 24 40.8 42.4 -1.6 23 49 1952 2022 1960 1962 bottom-third 36 41.3 42.4 -1.1 33 37 1952 2000 1962 1955 normal 2010 48 41.2 42.4 -1.2 29 39 1953 1992 1962 1963 normal 1965,1976,1986,2011 60 40.8 42.4 -1.6 20 46 1954 1992 1960 1962 bottom-third 1957,1976,1982