Contiguous U.S., Precipitation Rankings, October 2018 1901-2000 Inches 1 3.43 2.16 1.27 123 6 1952 2009 2017 2009 top-tenth 2 7.00 4.65 2.35 128 1 1952 2018 2017 2018 highest 3 9.98 7.27 2.71 128 1 1952 2018 2017 2018 highest 4 12.84 10.05 2.79 127 2 1952 1941 2017 1941 top-tenth 5 15.99 12.97 3.02 127 2 1952 1941 2017 1941 top-tenth 6 19.01 15.88 3.13 126 3 1952 1941 2017 1941 top-tenth 7 21.47 18.40 3.07 123 6 1952 1941 2017 2015 top-tenth 8 23.95 20.91 3.04 123 6 1956 2019 2017 2009 top-tenth 9 26.84 23.04 3.80 127 2 1934 2019 2017 2018 top-tenth 10 28.69 25.36 3.33 124 5 1934 2019 2016 2017 top-tenth 11 30.28 27.70 2.58 113 15 1931 2019 2015 2017 top-third 12 31.90 29.93 1.97 100 28 1934 2019 2015 2017 top-third 18 49.42 45.83 3.59 111 17 1931 2019 2015 2017 top-third 24 65.47 59.90 5.57 115 12 1931 2019 2015 2017 top-tenth 36 99.83 89.86 9.97 123 3 1956 2019 2017 1975 top-tenth 48 131.72 119.78 11.94 121 4 1956 2019 2017 1998 top-tenth 60 162.11 149.66 12.45 117 7 1934 2019 2017 1999 top-tenth