1991-2020 Degrees Fahrenheit 1 63.9 64.5 -0.6 52 41 1973 2011 1931 1932 normal 2 56.0 60.5 -4.5 6 87 1958 2011 1931 1932 bottom-tenth 1947,1973 3 55.2 56.5 -1.3 45 48 1958 2017 1931 1932 normal 2022 4 51.9 53.4 -1.5 41 50 1958 2017 1931 1932 normal 1969,2002 5 49.9 51.7 -1.8 32 59 1973 2017 1931 1932 normal 1939,1975 6 50.8 51.8 -1.0 43 48 1973 2017 1931 1932 normal 1956,1978,2019 7 53.0 53.7 -0.7 53 38 1958 2017 1931 1932 normal 2002,2021 8 56.3 56.3 0.0 63 28 1977 2017 1931 1932 top-third 1978,2009 9 58.9 59.1 -0.2 62 29 1977 2017 1931 1932 top-third 1957,1963,1967,1991 10 61.1 61.4 -0.3 58 33 1977 2017 1931 1932 normal 1963,2003 11 62.9 63.2 -0.3 59 32 1977 2017 1931 1932 normal 1967,1982 12 63.3 64.1 -0.8 43 47 1977 1999 1932 1932 normal 1946,1965,2001 18 58.6 60.0 -1.4 27 62 1977 2017 1932 1932 bottom-third 1949 24 -99 64.1 -99 -99 -99 1977 2000 normal 36 -99 64.0 -99 -99 -99 1977 2018 normal 48 -99 64.0 -99 -99 -99 1961,1977 2002,2019,2020 normal 60 -99 64.0 -99 -99 -99 1977 2020 normal