Standardized Precipitation Index Table

North Central Climate Division

Arizona, Climate Division 03

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.92 1.65 5.08 6.99 9.47 11.13 11.92 12.79 13.7 14.34 16.35 16.74 17.05 19.16 27.68 32.83 39.73 56.79 69.68 80.26
Accumulated Precipitation Departure from Normal (in.) -0.76 -1.51 0.86 1.73 2.82 2 0.82 1.43 1.96 1.85 2.34 1.09 -2.86 -5.65 -3.65 -7.71 -7.32 -6.03 -8.95 -14.26
Accumulated Precipitation Percent of Average 55 52 120 133 142 122 107 113 117 115 117 107 86 77 88 81 84 90 89 85
Accumulated Precipitation Percentile (non-exceedance) 41.5 30.6 69.5 76.6 84.6 75.8 63.2 69.2 73.8 72 74.9 63.6 29.8 14.8 30 14.3 19 27.8 21.6 12.1
Standardized Precipitation Index -0.21 -0.51 0.51 0.72 1.02 0.7 0.34 0.5 0.64 0.58 0.67 0.35 -0.53 -1.04 -0.52 -1.07 -0.88 -0.59 -0.78 -1.17