1991-2020 Degrees Fahrenheit 1 44.2 44.7 -0.5 54 38 1949 1953 1955 1954 normal 2 45.6 45.0 0.6 70 22 1984 2022 1955 1953 top-third 3 47.5 47.7 -0.2 56 36 1977 2022 1955 1953 normal 1941 4 51.9 52.2 -0.3 58 34 1977 2022 1955 1955 normal 1955,1969,2009 5 56.7 56.8 -0.1 64 28 1977 2022 1954 1955 top-third 1996 6 60.7 61.0 -0.3 58 34 1977 2022 1954 1955 normal 1938,1957 7 63.6 64.1 -0.5 54 38 1977 2017 1951 1955 normal 1986 8 65.6 66.3 -0.7 53 39 1977 1999 1951 1955 normal 2005 9 66.4 67.2 -0.8 53 38 1977 1999 1951 1955 normal 1966,1982 10 66.6 67.0 -0.4 60 31 1977 2023 1953 1955 normal 1949,1953,1978 11 65.6 66.1 -0.5 61 30 1977 2012 1953 1955 top-third 1965 12 63.9 64.7 -0.8 55 36 1977 2012 1951 1955 normal 1950,1951,1991,2011 18 63.1 63.4 -0.3 63 27 1977 2023 1951 1955 top-third 1957,1995,1997 24 64.3 64.6 -0.3 64 25 1977 2013 1954 1955 top-third 1954,2010 36 64.4 64.6 -0.2 66 21 1977 2019 1955 1955 top-third 1955,1997,2007 48 64.3 64.5 -0.2 61 24 1977 2020 1953 1955 top-third 1957,2010 60 64.4 64.5 -0.1 60 23 1977 2021 1955 1955 top-third 1955