Standardized Precipitation Index Table

South Central Climate Division

South Dakota, Climate Division 08

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.) 0.56 1.26 1.68 2.73 3.09 7.05 9.69 12.51 16.91 20.92 24.92 26.02 29.02 31.62 45.04 48.76 61.84 81.11 113.26 139.42
Accumulated Precipitation Departure from Normal (in.) -0.57 -0.42 -0.45 0.11 -0.14 2.48 3.54 4.13 5.92 6.57 7.45 6.31 7.18 7.32 5.63 4.76 2.72 2.21 14.56 20.97
Accumulated Precipitation Percent of Average 50 75 79 104 96 154 157 149 154 146 143 132 133 130 114 111 105 103 115 118
Accumulated Precipitation Percentile (non-exceedance) 21 34.5 33.3 59.4 48.6 94.4 95.5 94.9 97.4 97.2 96.5 93.3 94.5 93.4 82.7 77.6 65.2 60.8 90.7 95.2
Standardized Precipitation Index -0.81 -0.4 -0.43 0.24 -0.04 1.59 1.7 1.64 1.94 1.92 1.82 1.5 1.6 1.51 0.94 0.76 0.39 0.27 1.32 1.66