Standardized Precipitation Index Table

Central Climate Division

South Dakota, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.24 0.71 1.65 2.3 5.87 9.19 11.63 13.86 18.15 20.89 21.67 21.76 23.47 26.54 40.19 50.33 62.32 79.83 96.03 112.97
Accumulated Precipitation Departure from Normal (in.) -0.16 -0.13 0.27 -0.3 1.84 3.09 3.16 2.26 3.77 4.61 4.41 4 4.29 2.65 4.65 8.64 8.99 8.73 7.12 6.24
Accumulated Precipitation Percent of Average 60 84 120 88 146 151 137 119 126 128 126 123 122 111 113 121 117 112 108 106
Accumulated Precipitation Percentile (non-exceedance) 37.2 45.6 70.6 45.7 86.4 91.4 88.9 79.1 85.6 88.6 87.3 85 86.3 73.4 79.7 90.4 88.3 83.3 75.7 70.8
Standardized Precipitation Index -0.33 -0.11 0.54 -0.11 1.1 1.37 1.22 0.81 1.06 1.21 1.14 1.04 1.09 0.62 0.83 1.3 1.19 0.97 0.7 0.55