Standardized Precipitation Index Table

Southwest Climate Division

Arizona, Climate Division 05

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.36 1.35 2.61 3.29 3.48 3.48 4.4 5.55 5.69 5.69 5.77 5.77 7.77 8.8 11.98 13.12 16.43 18.23 25.4 32.28
Accumulated Precipitation Departure from Normal (in.) -0.13 0.28 0.9 0.97 0.81 0.46 0.88 1.13 0.72 0.69 0.72 0.56 0.87 0.55 1.54 -0.34 0.79 -2.63 -0.73 0.87
Accumulated Precipitation Percent of Average 74 126 152 142 130 115 125 126 114 114 114 111 113 107 115 97 105 87 97 103
Accumulated Precipitation Percentile (non-exceedance) 56.7 72 80 77.5 73.8 67 72.5 74.5 67.8 67.4 67.8 65 67.4 62.1 71.9 49.5 61.3 28 46.4 58.6
Standardized Precipitation Index 0.17 0.58 0.84 0.76 0.64 0.44 0.6 0.66 0.46 0.45 0.46 0.39 0.45 0.31 0.58 -0.01 0.29 -0.58 -0.09 0.22