Standardized Precipitation Index Table

Southwest Climate Division

Arkansas, Climate Division 07

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.) 8.15 18.02 20.96 24.91 29.91 38.43 45.17 45.91 49.33 50.61 56.25 59.9 79.37 93.84 121.91 157.76 178.7 226.09 294.74 361.8
Accumulated Precipitation Departure from Normal (in.) 2.61 7.27 5.34 5.37 6.31 10.22 12.67 9.63 9.47 7.46 9.1 8.58 12.47 14.33 19.27 26.86 24.72 20.7 37.89 53.49
Accumulated Precipitation Percent of Average 147 168 134 128 127 136 139 127 124 117 119 117 119 118 119 121 116 110 115 117
Accumulated Precipitation Percentile (non-exceedance) 84.2 95.6 87.3 84.9 86.4 93.6 95 88.7 87.5 81.8 85.1 82.5 86.4 87.4 90.6 94.2 91 84 94.1 97.6
Standardized Precipitation Index 1 1.71 1.14 1.03 1.1 1.52 1.65 1.21 1.15 0.91 1.04 0.94 1.1 1.14 1.32 1.57 1.34 0.99 1.56 1.98