1991-2020 Degrees Fahrenheit 1 54.0 53.9 0.1 48 29 1975 2023 2014 2013 normal 2013 2 45.9 48.6 -2.7 16 59 1950 2012 2014 2012 bottom-third 3 38.9 44.3 -5.4 2 73 1978 2023 1978 2014 bottom-tenth 4 36.8 41.6 -4.8 3 72 1978 2023 1978 2014 bottom-tenth 5 37.5 40.9 -3.4 7 67 1978 2023 2014 2014 bottom-tenth 1956,1964,1977,2014 6 38.5 41.9 -3.4 8 65 1978 2023 1996 2014 bottom-third 1982,1996 7 41.3 44.1 -2.8 9 64 1978 2002 2003 2014 bottom-third 1968,2003 8 44.7 47.2 -2.5 12 61 1978 2023 2014 2012 bottom-third 1979 9 47.8 50.3 -2.5 8 65 1977 2023 2014 2014 bottom-third 1965,2014 10 50.7 53.0 -2.3 9 64 1977 2023 1982 2014 bottom-third 1964 11 52.7 54.8 -2.1 12 61 1963,1978 2023 1993 2014 bottom-third 1966,1993 12 53.6 55.5 -1.9 13 60 1968,1977 2023 1993 2014 bottom-third 1965,1984 18 48.6 51.0 -2.4 9 60 1978 2017 1982 2012 bottom-third 24 53.7 55.5 -1.8 11 58 1978 2017 1982 2012 bottom-third 1966,1971,1982 36 -99 55.4 -99 -99 -99 1979 2023 normal 48 -99 55.4 -99 -99 -99 1964,1970,1980 2023 normal 60 -99 55.3 -99 -99 -99 1965 2023 normal