Standardized Precipitation Index Table

North Central Climate Division

Arkansas, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 9.01 19.83 21.81 24.94 30.2 35.83 43.31 44.75 49.16 50.97 60.26 62.59 75.51 86.45 110.03 139.78 158.13 210.09 261.11 321.77
Accumulated Precipitation Departure from Normal (in.) 3.73 9.75 7.23 7.16 9 10.83 14.27 12.2 12.95 11.12 16.68 15 13.39 13.96 14.97 19.81 15.6 20.11 23.72 36.94
Accumulated Precipitation Percent of Average 171 197 150 140 142 143 149 137 136 128 138 132 122 119 116 117 111 111 110 113
Accumulated Precipitation Percentile (non-exceedance) 90.6 98.6 93.2 91.2 93.7 95.6 97.7 95.4 95.4 92 97.4 95.9 91.4 89.8 88.6 91.9 85.3 88.2 89.5 96
Standardized Precipitation Index 1.32 2.21 1.49 1.35 1.53 1.71 2 1.69 1.69 1.41 1.95 1.73 1.37 1.27 1.2 1.4 1.05 1.18 1.25 1.75