Standardized Precipitation Index Table

South Central Climate Division

Arizona, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.15 0.16 0.2 0.25 2.49 3.87 4.17 5.97 9.19 9.19 11.38 11.85 12.76 16.56 24.09 27.62 29.73 40.43 48.73 61.84
Accumulated Precipitation Departure from Normal (in.) -1.15 -1.25 -1.37 -1.66 -0.37 -0.01 -0.81 -0.17 2.28 1.62 2.86 1.7 1.03 2.53 3.81 3.46 -0.66 -0.12 -1.99 0.89
Accumulated Precipitation Percent of Average 12 11 13 13 87 100 84 97 133 121 134 117 109 118 119 114 98 100 96 101
Accumulated Precipitation Percentile (non-exceedance) 0.6 0.4 0.3 0.2 44.1 55.5 39.6 52.8 80.9 74 83.8 73.1 65.3 76.4 80.2 76 48.1 51.6 41.9 55.9
Standardized Precipitation Index -2.49 -2.69 -2.78 -2.87 -0.15 0.14 -0.26 0.07 0.87 0.64 0.99 0.61 0.39 0.72 0.85 0.71 -0.05 0.04 -0.2 0.15