Standardized Precipitation Index Table

Northwest Climate Division

South Dakota, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.63 0.93 1.1 1.46 1.56 2.58 4.63 7.89 9.18 14.77 18.91 19.53 21.17 22.99 34.01 38.45 47.59 59.82 84.92 103.14
Accumulated Precipitation Departure from Normal (in.) -0.24 -0.41 -0.64 -0.69 -1.07 -1.1 -0.24 1.46 0.68 3.16 4.6 3.71 3.6 3.47 2.38 3.16 0.18 -3.41 5.82 8.24
Accumulated Precipitation Percent of Average 72 70 63 68 59 70 95 123 108 127 132 123 120 118 108 109 100 95 107 109
Accumulated Precipitation Percentile (non-exceedance) 39 29.7 19.5 20.2 11.8 19.2 48.2 80 65.6 87.5 90.6 85.2 83.9 81.2 68.8 72.3 53 34.9 74.5 79.4
Standardized Precipitation Index -0.28 -0.53 -0.86 -0.84 -1.19 -0.87 -0.04 0.84 0.4 1.15 1.31 1.05 0.99 0.89 0.49 0.59 0.07 -0.39 0.66 0.82