1991-2020 Degrees Fahrenheit 1 64.9 64.3 0.6 61 32 1976 1973 1941 1934 normal 2 -99 69.1 -99 -99 -99 1976 2016 normal 3 -99 73.5 -99 -99 -99 1976 2016 normal 4 -99 76.6 -99 -99 -99 1976 2016 normal 5 -99 78.5 -99 -99 -99 1976 2016 normal 6 -99 79.4 -99 -99 -99 1976 1998,2016 normal 7 -99 79.3 -99 -99 -99 1976 1998 normal 8 -99 78.3 -99 -99 -99 1976 2011 normal 9 -99 76.9 -99 -99 -99 1976 2011 normal 10 -99 75.2 -99 -99 -99 1976 2017 normal 11 -99 73.5 -99 -99 -99 1940 2017 normal 12 -99 72.1 -99 -99 -99 1979 2017 normal 18 -99 74.5 -99 -99 -99 1977 2017 normal 24 -99 72.1 -99 -99 -99 1979 2017 normal 36 -99 72.1 -99 -99 -99 1979,1980 2017,2018 normal 48 -99 72.1 -99 -99 -99 1979 2019 normal 60 -99 72.1 -99 -99 -99 1980 2020 normal