Standardized Precipitation Index Table

Central Climate Division

Arkansas, Climate Division 05

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.41 13.14 19.77 26.39 32.63 38.19 39.86 44.92 51.28 52.93 57.95 62.06 87.85 104.29 142.49 175.55 195.16 249.12 309.1 367.68
Accumulated Precipitation Departure from Normal (in.) 1.37 3.61 4.99 6.62 9 10.38 7.47 8.04 10.64 8.63 10.22 10.5 21.55 25.01 39.41 44.86 40.73 43.32 51.95 59.17
Accumulated Precipitation Percent of Average 134 138 134 134 138 137 123 122 126 119 121 120 133 132 138 134 126 121 120 119
Accumulated Precipitation Percentile (non-exceedance) 77.2 84.4 85.9 88.4 92.6 93.7 85.7 85.2 89.8 85 88 87.8 97.6 97.9 99.6 99.8 99.3 99.2 99.7 99.8
Standardized Precipitation Index 0.74 1.01 1.07 1.2 1.45 1.53 1.07 1.05 1.27 1.04 1.17 1.17 1.97 2.03 2.66 2.83 2.44 2.42 2.72 2.95