Standardized Precipitation Index Table

East Central Climate Division

South Dakota, 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.) 2.08 2.61 2.85 3.02 3.66 5.04 5.94 7.92 13.36 17.29 21.79 25.04 29.02 31.62 47.76 55.74 73.21 93.76 115.86 137.61
Accumulated Precipitation Departure from Normal (in.) -0.18 -0.8 -1.15 -1.5 -1.43 -0.88 -1.6 -1.74 0.97 1.94 2.68 2.92 2.9 3.59 3.56 5.65 6.95 5.46 5.47 5.12
Accumulated Precipitation Percent of Average 92 77 71 67 72 85 79 82 108 113 114 113 111 113 108 111 110 106 105 104
Accumulated Precipitation Percentile (non-exceedance) 51.8 34.2 25.3 17.2 19.7 34.4 25.1 27.5 65.5 74 78.1 77.5 75.4 79.1 72.7 81.1 80.3 71.5 69 66.1
Standardized Precipitation Index 0.04 -0.41 -0.67 -0.94 -0.85 -0.4 -0.67 -0.6 0.4 0.64 0.78 0.76 0.69 0.81 0.6 0.88 0.85 0.57 0.5 0.41