Standardized Precipitation Index Table

North Central Climate Division

Arkansas, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of Dec. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.72 4.78 10.03 14.61 19.76 22.33 26.46 34.64 39.69 46.08 50.58 55.72 68.65 80.38 119.23 148.47 175.42 224.93 271.35 339.76
Accumulated Precipitation Departure from Normal (in.) -1.01 -3.01 -1.26 -0.37 1.14 0.04 0.11 3.07 3.37 5.29 6.6 8.37 9.98 10.71 24.57 31.46 33.52 35.86 35.22 56.53
Accumulated Precipitation Percent of Average 73 61 89 98 106 100 100 110 109 113 115 118 117 115 126 127 124 119 115 120
Accumulated Precipitation Percentile (non-exceedance) 37.7 19.2 42.8 51.4 61.9 53.7 53.8 69.8 69.6 76.4 80 84.1 86 85.3 97.4 98.6 98.6 98.3 97.3 99.8
Standardized Precipitation Index -0.31 -0.87 -0.18 0.04 0.3 0.09 0.09 0.52 0.51 0.72 0.84 1 1.08 1.05 1.95 2.19 2.2 2.11 1.92 2.83