Standardized Precipitation Index Table

Southwest Climate Division

Arkansas, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Apr. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.23 8.28 10.13 12.14 13.03 18.06 20.78 24.35 28.12 32.17 37.79 45.92 62.64 82.95 104.59 134.53 164.93 222.26 273.85 341.79
Accumulated Precipitation Departure from Normal (in.) 0.02 -1.79 -3.84 -5.87 -9.57 -8.83 -9.88 -9.89 -9.42 -9.37 -7.93 -5.34 -2.61 4.69 1.99 4.89 10.93 16.81 16.97 33.36
Accumulated Precipitation Percent of Average 100 82 73 67 58 67 68 71 75 77 83 90 96 106 102 104 107 108 107 111
Accumulated Precipitation Percentile (non-exceedance) 56.8 33.5 18 8.8 2 6.3 6.2 7.2 9.5 11.1 17.6 29.2 42.6 66.8 57.4 63.4 73.9 79.5 76.9 89.8
Standardized Precipitation Index 0.17 -0.43 -0.91 -1.36 -2.04 -1.53 -1.54 -1.46 -1.31 -1.22 -0.93 -0.55 -0.19 0.43 0.19 0.34 0.64 0.82 0.74 1.27