1991-2020 Degrees Fahrenheit 1 43.0 51.6 -8.6 1 78 1949 2019 1949 1948 lowest 2 44.8 51.5 -6.7 1 78 1949 2015 1949 1948 lowest 3 47.8 53.2 -5.4 1 78 1949 2015 1949 1948 lowest 4 50.8 55.6 -4.8 1 78 1949 2015 1949 1948 lowest 5 52.8 57.6 -4.8 1 78 1949 2015 1949 1948 lowest 6 54.4 58.8 -4.4 1 78 1949 2015 1949 1948 lowest 7 55.5 59.6 -4.1 1 77 1949 2015 1949 1948 lowest 8 56.2 60.0 -3.8 1 76 1949 2015 1949 1948 lowest 9 56.1 60.0 -3.9 1 76 1949 2015 1949 1948 lowest 10 55.8 59.7 -3.9 1 76 1949 2015 1949 1948 lowest 11 55.4 59.4 -4.0 1 76 1949 2015 1949 1948 lowest 12 54.8 58.9 -4.1 1 75 1949 2015 1949 1947 lowest 18 55.4 58.8 -3.4 2 74 1950 2016,2021 1949 1947 bottom-tenth 24 -99 58.8 -99 -99 -99 1950 2016 normal 36 -99 58.8 -99 -99 -99 1951,1957 2017 normal 48 -99 58.8 -99 -99 -99 1952 2018 normal 60 -99 58.7 -99 -99 -99 1953 2018 normal