Southwest Climate Region, Precipitation Rankings, May 2015 1901-2000 Inches 1 2.93 1.11 1.82 128 1 1974 2015 2014 2015 highest 2 3.91 2.17 1.74 125 4 2002 1941 2014 1957 top-tenth 3 4.80 3.33 1.47 121 8 2002 1941 2014 1995 top-tenth 4 5.64 4.33 1.31 113 16 2002 1905 2014 1995 top-third 5 6.87 5.31 1.56 115 14 1972 1905 2014 2005 top-third 6 8.05 6.32 1.73 111 17 2002 1905 2014 2005 top-third 1906 7 8.68 7.21 1.47 104 24 2002 1941 2014 2005 top-third 8 9.34 8.34 1.00 97 31 2002 1941 2014 2005 top-third 1957 9 11.95 9.71 2.24 109 19 2002 1941 2014 2005 top-third 10 14.54 11.72 2.82 114 14 2002 1941 2014 2005 top-third 11 16.86 13.59 3.27 116 12 2021 1941 2014 2005 top-tenth 12 17.36 14.53 2.83 112 16 2021 1905 2014 2005 top-third 18 21.60 20.86 0.74 92 35 2021 1942 2014 2005 top-third 1988 24 31.86 29.05 2.81 104 23 2021 1942 2014 1999 top-third 36 42.53 43.54 -1.01 59 67 2022 1907 2014 2009 normal 48 53.89 58.01 -4.12 31 94 1904 1986 2014 2011 bottom-third 1937 60 67.86 72.48 -4.62 30 94 1957 1987 2014 2011 bottom-third