Standardized Precipitation Index Table

South Central Climate Division

Arkansas, Climate Division 08

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.) 8.1 17.51 20.71 25.4 28.89 36.86 41.45 41.9 44.34 45.82 50.58 53.58 75.65 91.12 112.83 150.55 173.01 223.1 289.91 353.15
Accumulated Precipitation Departure from Normal (in.) 3.07 7.22 5.23 5.61 4.42 7.28 7.46 4.31 3.39 1.61 2.32 1.4 8.03 9.37 8.44 16.58 16.39 14.22 28.75 39.71
Accumulated Precipitation Percent of Average 161 170 134 128 118 125 122 111 108 104 105 103 112 111 108 112 110 107 111 113
Accumulated Precipitation Percentile (non-exceedance) 88.7 95.4 86.5 85 78.5 85.8 83.8 71.9 67.8 59.9 62.4 58.2 77.4 78.2 73.6 84.8 82.9 77 90.2 94.8
Standardized Precipitation Index 1.21 1.69 1.1 1.04 0.79 1.07 0.99 0.58 0.46 0.25 0.32 0.21 0.75 0.78 0.63 1.03 0.95 0.74 1.3 1.63