1991-2020 Degrees Fahrenheit 1 15.0 19.2 -4.2 31 45 2019 1954 2001 2002 normal 2 15.2 17.6 -2.4 37 39 1950,1979 1992 2001 2002 normal 3 18.5 18.2 0.3 49 26 1950,1979 1992 2001 2002 normal 2022 4 22.3 21.1 1.2 51 24 1979 2000 2001 2002 top-third 5 24.4 25.6 -1.2 37 38 1979 2000 2001 2002 normal 6 30.3 31.0 -0.7 41 34 1979 2016 2001 2002 normal 7 35.4 36.3 -0.9 37 38 1952,1978 2016 2001 2002 normal 1963,1975 8 40.2 40.4 -0.2 42 33 1952,1979 2016 2001 2002 normal 2015 9 42.8 42.8 0.0 42 32 1952 2016 2001 2002 normal 1958 10 43.3 43.7 -0.4 39 35 1952 2016,2022 2001 2002 normal 11 42.8 43.5 -0.7 35 39 1952 2016 2001 2002 normal 1963 12 40.6 42.4 -1.8 26 48 1952 2016 1997 2002 normal 18 38.6 38.6 0.0 50 23 1952 2013 1998 2002 top-third 24 42.7 42.4 0.3 53 19 1952 2022 1998 2002 top-third 1964,2018 36 42.1 42.4 -0.3 48 22 1952 2000 1999 2002 top-third 1999,2019 48 42.7 42.4 0.3 52 16 1953 1992 1999 2002 top-third 2005 60 43.0 42.4 0.6 58 8 1954 1992 2001 2002 top-third