1991-2020 Degrees Fahrenheit 1 41.6 43.3 -1.7 26 49 1960 2012 1972 1974 normal 1954 2 38.6 39.5 -0.9 36 39 1978 2012 1974 1973 normal 2001 3 37.9 37.5 0.4 51 24 1978 2023 1974 1973 top-third 1950 4 38.0 37.6 0.4 51 23 1978 2012 1974 1973 top-third 2007 5 39.7 39.5 0.2 52 21 1978 2012 1974 1953 top-third 1992 6 41.8 42.4 -0.6 40 33 1978 2002,2012 1973 1974 normal 7 45.4 46.2 -0.8 40 33 1977 2016 1971 1974 normal 1957,1960 8 49.2 49.9 -0.7 40 33 1977 2016 1973 1974 normal 1971,2004 9 52.1 53.0 -0.9 39 34 1977 2012 1973 1974 normal 1973,2011 10 53.8 54.9 -1.1 34 39 1977 2012 1973 1974 normal 1955,1962 11 54.5 55.7 -1.2 32 41 1977 2012 1973 1974 normal 1955,1973,1996 12 54.5 55.5 -1.0 33 40 1968 2012,2020 1973 1974 normal 2003 18 50.5 51.1 -0.6 42 27 1978 2017,2023 1973 1974 normal 1955,1995 24 55.0 55.5 -0.5 44 25 1978 2017 1974 1955 normal 1955,1998,2001 36 54.7 55.4 -0.7 33 32 1979 2022 1973 1974 normal 1985 48 54.8 55.4 -0.6 35 26 1970,1980 2023 1974 1974 normal 1974,1976,1994,1997,2004 60 54.8 55.3 -0.5 33 25 1970 2020,2023 1974 1957 normal 1957,1993,1994,1996