1991-2020 Degrees Fahrenheit 1 22.3 19.2 3.1 52 24 2019 1954 2015 2016 top-third 2 17.1 17.6 -0.5 42 34 1950,1979 1992 2014 2016 normal 3 14.9 18.2 -3.3 32 43 1950,1979 1992 2011 2016 normal 4 20.9 21.1 -0.2 42 33 1979 2000 2011 2016 normal 5 25.8 25.6 0.2 45 30 1979 2000 2011 2016 normal 1991 6 31.2 31.0 0.2 46 29 1979 2016 2011 2016 normal 7 36.2 36.3 -0.1 45 30 1952,1978 2016 2011 2016 normal 8 40.3 40.4 -0.1 43 32 1952,1979 2016 2015 2016 normal 9 43.0 42.8 0.2 45 29 1952 2016 2015 2016 normal 2020 10 44.0 43.7 0.3 47 27 1952 2016,2022 2015 2016 normal 2005 11 43.8 43.5 0.3 49 25 1952 2016 2015 2016 normal 12 43.2 42.4 0.8 55 19 1952 2016 2015 2016 top-third 1991,2012 18 40.8 38.6 2.2 67 6 1952 2013 2012 2016 top-tenth 24 44.5 42.4 2.1 70 2 1952 2022 2016 2017 top-tenth 36 43.6 42.4 1.2 61 9 1952 2000 2013 2008 top-third 2007 48 -99 42.4 -99 -99 -99 1953 1992 normal 60 -99 42.4 -99 -99 -99 1954 1992 normal