Standardized Precipitation Index Table

West Central Climate Division

Arkansas, Climate Division 04

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.) 9.12 17.3 19.51 22.66 27.83 33.54 42.24 43.42 45.01 48.78 54.05 57.05 73.58 84.72 106.93 138.34 160.69 210.57 269.37 338.36
Accumulated Precipitation Departure from Normal (in.) 3.3 6.48 4.14 3.97 5.72 7.58 12.23 9.51 7.24 7.38 8.82 7.53 8.73 9.3 7.95 13.36 12.15 12.52 21.82 41.3
Accumulated Precipitation Percent of Average 157 160 127 121 126 129 141 128 119 118 120 115 113 112 108 111 108 106 109 114
Accumulated Precipitation Percentile (non-exceedance) 88 94.7 82.3 79.1 84.1 89 95.4 90.1 83.5 83.1 86.3 82 81 79.8 74.1 82 78.3 75.7 85.2 95.9
Standardized Precipitation Index 1.18 1.62 0.92 0.81 1 1.23 1.68 1.29 0.97 0.96 1.09 0.91 0.88 0.83 0.64 0.92 0.78 0.7 1.05 1.74