Standardized Precipitation Index Table

Central Climate Division

Arkansas, Climate Division 05

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.) 8.8 19.02 21.1 25.56 29.6 35.86 41.18 41.88 43.56 45 51.31 54.14 73.09 87.57 107.69 144.71 163.48 213.17 270.36 332.49
Accumulated Precipitation Departure from Normal (in.) 3.25 8.16 5.24 5.82 5.63 7.3 8.17 5.14 3.21 1.23 3.7 2.48 5.61 7.39 4.37 12.84 8.45 6.42 11.87 22.21
Accumulated Precipitation Percent of Average 159 175 133 129 124 126 125 114 108 103 108 105 108 109 104 110 105 103 105 107
Accumulated Precipitation Percentile (non-exceedance) 86.9 96.2 85.8 85.7 83 86.5 86.7 75.9 67.7 58.4 68.7 63.3 71.9 74.7 64.4 81.1 71.2 65.3 73.8 85.9
Standardized Precipitation Index 1.12 1.77 1.07 1.07 0.95 1.1 1.11 0.7 0.46 0.21 0.49 0.34 0.58 0.67 0.37 0.88 0.56 0.39 0.64 1.08