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 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 8.09 13.39 19.78 24.28 29.42 30.93 37.05 42.35 44.17 50.45 54.08 60.19 80.98 99.12 124.94 152.29 169.83 226.38 284.21 337.59
Accumulated Precipitation Departure from Normal (in.) 2.87 3.42 5.34 6.64 8.42 6.13 8.18 10 8.13 10.78 10.74 12.79 19.18 26.98 30.25 32.97 27.99 37.39 48.16 54.51
Accumulated Precipitation Percent of Average 155 134 137 138 140 125 128 131 123 127 125 127 131 137 132 128 120 120 120 119
Accumulated Precipitation Percentile (non-exceedance) 86.2 83.7 87.8 89.9 92.7 85.4 89.3 92.3 86.9 91.4 90.7 93.3 97.1 98.9 98.9 98.9 96.7 98.6 99.5 99.7
Standardized Precipitation Index 1.09 0.98 1.17 1.28 1.45 1.05 1.24 1.42 1.12 1.36 1.32 1.5 1.89 2.29 2.29 2.28 1.84 2.19 2.56 2.72