Standardized Precipitation Index Table

Black Hills (S) Climate Division

South Dakota, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of Feb. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1 1.3 1.95 2.16 4.65 6.62 8.88 11.53 16.45 21.29 22.51 24.12 26.64 28.71 41.77 47.44 60.29 75.55 104.06 129.83
Accumulated Precipitation Departure from Normal (in.) 0.3 -0.05 -0.04 -0.54 0.67 1.19 1.5 1.48 3.01 4.45 3.54 4 4.56 3.19 1.58 1.85 0.02 -4.84 3.47 9.12
Accumulated Precipitation Percent of Average 142 97 98 80 117 122 120 115 122 126 119 120 121 113 104 104 100 94 103 108
Accumulated Precipitation Percentile (non-exceedance) 81.6 51.7 52.1 26 73.5 79.7 80.7 75.8 85.5 88.4 82.3 84.8 86.5 77.2 62.3 63.2 51.8 30.2 64.5 79.1
Standardized Precipitation Index 0.9 0.04 0.05 -0.64 0.63 0.83 0.86 0.7 1.06 1.19 0.93 1.03 1.1 0.74 0.31 0.34 0.04 -0.52 0.37 0.81