Standardized Precipitation Index Table

Southeast (S) Climate Division

Arizona, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Aug. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.21 2.42 2.56 2.64 2.73 4.64 5.83 6.59 8.5 12.2 12.24 15.25 19.12 20.9 30.79 37.15 40.46 54.54 69.19 86.17
Accumulated Precipitation Departure from Normal (in.) -1.6 -3.19 -3.43 -3.58 -3.85 -2.82 -2.64 -2.97 -2.29 0.58 -0.28 1.22 -0.93 -0.62 2.74 1.6 -1.59 -1.53 -0.93 1.95
Accumulated Precipitation Percent of Average 43 43 43 42 42 62 69 69 79 105 98 109 95 97 110 104 96 97 99 102
Accumulated Precipitation Percentile (non-exceedance) 2.7 0.3 0.2 0.1 0.1 2.8 6.8 6.9 19.5 61.1 49.6 67 42 45.9 72.5 63.4 41.8 43.6 47.3 59.5
Standardized Precipitation Index -1.93 -2.77 -2.89 -2.97 -3.18 -1.91 -1.49 -1.48 -0.86 0.28 -0.01 0.44 -0.2 -0.1 0.6 0.34 -0.21 -0.16 -0.07 0.24