Standardized Precipitation Index Table

Southwest Climate Division

South Dakota, Climate Division 05

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.) 0.32 1.01 1.19 1.89 2.04 4.92 6.67 8.95 11.96 16.07 20.54 21.71 24.33 25.96 37.29 41.47 51.46 65.17 91.42 112.58
Accumulated Precipitation Departure from Normal (in.) -0.68 -0.47 -0.71 -0.44 -0.8 0.9 1.39 2.01 2.79 3.86 5.31 4.6 5.31 4.81 3.08 3.22 0.14 -3.33 5.69 9.67
Accumulated Precipitation Percent of Average 32 68 63 81 72 122 126 129 130 132 135 127 128 123 109 108 100 95 107 109
Accumulated Precipitation Percentile (non-exceedance) 6.5 25.2 14.9 28.2 15 79.1 83.3 86.6 89.6 92 93.5 89.6 92.2 88.2 72.9 72.6 52.6 35.4 73.6 82.2
Standardized Precipitation Index -1.51 -0.67 -1.04 -0.58 -1.04 0.81 0.96 1.11 1.26 1.41 1.51 1.26 1.42 1.19 0.61 0.6 0.06 -0.37 0.63 0.92