Southwest Climate Region, Precipitation Rankings, May 1899 1901-2000 Inches 1 0.36 1.11 -0.75 5 125 1974 2015 1899 1898 bottom-tenth 2 0.85 2.17 -1.32 2 128 2002 1941 1899 1898 bottom-tenth 3 1.84 3.33 -1.49 11 119 2002 1941 1899 1898 bottom-tenth 4 2.79 4.33 -1.54 14 116 2002 1905 1896 1898 bottom-third 5 3.55 5.31 -1.76 14 116 1972 1905 1896 1898 bottom-third 6 4.74 6.32 -1.58 24 105 2002 1905 1896 1898 bottom-third 7 5.52 7.21 -1.69 30 99 2002 1941 1896 1898 bottom-third 8 5.91 8.34 -2.43 15 114 2002 1941 1899 1898 bottom-third 1934 9 6.41 9.71 -3.30 6 123 2002 1941 1899 1898 bottom-tenth 10 8.24 11.72 -3.48 7 122 2002 1941 1899 1898 bottom-tenth 11 10.37 13.59 -3.22 9 120 2021 1941 1899 1898 bottom-tenth 1963 12 11.82 14.53 -2.71 19 110 2021 1905 1899 1898 bottom-third 18 17.98 20.86 -2.88 25 103 2021 1942 1899 1898 bottom-third 1918 24 26.70 29.05 -2.35 34 94 2021 1942 1899 1898 bottom-third 1961 36 43.75 43.54 0.21 75 52 2022 1907 1899 1898 normal 48 56.21 58.01 -1.80 54 72 1904 1986 1899 1899 normal 60 -99 72.48 -99 -99 -99 1957 1987 normal