1991-2020 Degrees Fahrenheit 1 39.6 34.1 5.5 120 9 1951 1910 2014 2015 top-tenth 2 38.9 30.1 8.8 128 1 2019 2016 2015 2016 highest 3 35.1 28.4 6.7 127 2 1969 1992 2015 1992 top-tenth 4 33.0 27.7 5.3 124 4 1969 1992 2015 1992 top-tenth 1987 5 32.7 28.9 3.8 123 5 1969 1992 2015 2000 top-tenth 6 35.4 31.5 3.9 124 3 1969 2000 2015 2000 top-tenth 7 38.6 35.2 3.4 126 1 1969 2012,2016 2015 2012 highest 2012 8 42.3 39.1 3.2 124 3 1969 1992,2012 2015 2012 top-tenth 9 45.1 42.3 2.8 124 3 1969 1999,2012 2015 2012 top-tenth 1992 10 47.1 44.0 3.1 126 1 1969 2016 2015 2016 highest 11 47.4 44.7 2.7 126 1 1969 2016 2015 2016 highest 12 47.2 44.5 2.7 126 1 1969 1931,2016 2015 1931 highest 1931 18 43.0 40.2 2.8 124 1 1979 2016 2015 2016 highest 24 46.7 44.5 2.2 124 1 1979 2016 2015 2016 highest 36 45.7 44.5 1.2 120 3 1952 2017 2015 2008 top-tenth 48 46.0 44.6 1.4 120 1 1952 2016 2015 2016 highest 60 46.0 44.6 1.4 118 1 1952 2016 2015 2016 highest