Standardized Precipitation Index Table

Northwest (R) Climate Division

Arizona, Climate Division 01

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.) 1.68 3.66 4.7 4.85 5.07 5.27 6.88 8.94 9.12 9.46 9.67 9.73 15.55 17.57 23.43 26.91 31.1 34.68 47.12 60.5
Accumulated Precipitation Departure from Normal (in.) 0.6 1.43 1.32 0.51 0.03 -0.51 0.3 0.87 -0.09 0.06 -0.05 -0.55 1.91 1.47 2.83 0.54 0.25 -6.47 -4.42 -1.44
Accumulated Precipitation Percent of Average 155 164 139 112 100 91 105 111 99 101 99 95 114 109 114 102 101 84 91 98
Accumulated Precipitation Percentile (non-exceedance) 79.8 83.1 77 65.2 57 48.2 59.7 65.7 53.4 55.2 53.7 47.5 71.5 66.8 74.4 56.7 54.2 15.7 28.1 44.5
Standardized Precipitation Index 0.83 0.96 0.74 0.39 0.18 -0.05 0.25 0.4 0.08 0.13 0.09 -0.06 0.57 0.43 0.66 0.17 0.1 -1.01 -0.58 -0.14