Standardized Precipitation Index Table

Southeast (S) Climate Division

Arizona, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Dec. 2019)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.11 5.8 5.84 8.85 11.04 12.68 12.72 13.04 13.27 14.5 16.67 17.87 22.35 29.88 33.11 40 42.63 57.03 73.49 88.24
Accumulated Precipitation Departure from Normal (in.) 0.87 3.74 2.89 4.39 3.76 2.59 2.24 2.34 2.2 2.56 3.72 3.82 5.38 5.76 5.05 1.89 0.57 0.92 3.35 4.04
Accumulated Precipitation Percent of Average 171 281 198 198 152 126 121 122 120 121 129 127 132 124 118 105 101 102 105 105
Accumulated Precipitation Percentile (non-exceedance) 82.1 96.5 90.8 95.4 91 84.1 81 81.7 80 82.2 88.6 88.2 90.8 90 85 64.4 55.6 56.7 66.4 67.4
Standardized Precipitation Index 0.92 1.81 1.33 1.69 1.34 1 0.88 0.9 0.84 0.92 1.21 1.19 1.33 1.28 1.04 0.37 0.14 0.17 0.42 0.45