1925-2000 Degrees Fahrenheit 1 55.3 49.5 5.8 98 1 1969 2004 2003 2004 highest 2 56.3 51.2 5.1 98 1 1969 2004 2003 2004 highest 3 55.9 50.5 5.4 98 1 1949,1955,1965 2004 2003 2004 highest 4 52.7 47.3 5.4 98 1 1965 2004 2003 2004 highest 5 47.9 42.5 5.4 98 1 1949 2004 2003 2004 highest 6 41.6 37.2 4.4 96 3 1971 2019 2003 2004 top-tenth 7 37.1 32.6 4.5 96 3 1971,1972 2019 2003 2004 top-tenth 8 32.4 28.8 3.6 90 9 1971 2016 2003 2003 top-tenth 2003 9 29.3 26.0 3.3 86 12 1971 2016 2002 2003 top-third 10 27.9 24.6 3.3 88 10 1971 2016 2002 2003 top-tenth 1993 11 28.2 24.7 3.5 88 10 1971 2016 2002 2003 top-tenth 12 29.1 26.0 3.1 89 9 1971 2019 2002 2003 top-tenth 2001 18 32.3 29.7 2.6 88 10 1972 2016 2002 2003 top-tenth 1926 24 30.0 26.0 4.0 91 6 1972 2019 2003 2004 top-tenth 36 29.0 26.0 3.0 88 8 1973 2016 2003 2003 top-tenth 2003 48 29.0 25.9 3.1 87 8 1974 2019 2003 2004 top-tenth 2006,2022 60 28.5 25.9 2.6 83 11 1975 2019 2003 2004 top-third