1991-2020 Degrees Fahrenheit 1 62.7 63.5 -0.8 37 39 1967 2004 2020 2019 normal 2 58.6 58.7 -0.1 49 27 1967 2019 2020 2019 normal 1986,1993,2001 3 54.7 53.6 1.1 61 13 1950 2012 2020 2019 top-third 4 49.5 49.1 0.4 52 22 1978 2012 2018 2020 top-third 2018 5 46.6 46.0 0.6 59 15 1978 2012 2018 2020 top-third 2010 6 45.1 44.7 0.4 56 17 1978 2012 2018 2020 top-third 7 45.9 44.9 1.0 62 10 1978 2012 2020 2020 top-third 1949,1999,2020 8 47.4 46.5 0.9 61 11 1978 2012 2019 2020 top-third 1999 9 49.7 49.0 0.7 59 13 1978 2012 2018 2020 top-third 10 52.4 51.7 0.7 59 13 1978 2012 2018 2020 top-third 11 54.9 54.0 0.9 63 9 1963 2012 2019 2020 top-third 2000,2019 12 56.4 55.6 0.8 63 9 1963,1978 2012 2019 2020 top-third 2019 18 53.1 51.9 1.2 65 4 1979 2017 2019 2020 top-tenth 2012,2022 24 56.7 55.5 1.2 64 4 1978 2017 2020 2020 top-tenth 2020 36 56.6 55.5 1.1 61 3 1979 2022 2020 2018 top-tenth 48 56.4 55.4 1.0 56 4 1966,1980 2019,2020,2022 2018 2020 top-tenth 60 56.6 55.3 1.3 55 2 1967,1970 2020 2019 2020 top-tenth