Standardized Precipitation Index Table

Northeast Climate Division

South Dakota, Climate Division 03

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.9 6.36 8.78 10.38 10.54 10.68 11.17 12.38 13.18 16.07 21.14 24.61 37.56 42.6 51.72 64.85 73.95 94.04 113.84 134.63
Accumulated Precipitation Departure from Normal (in.) -0.09 -0.35 -0.81 -1.29 -2.19 -2.66 -2.73 -2.07 -2.03 -0.7 2.37 3.25 6.61 7.88 9.07 8.87 10.1 8.98 7.53 7.06
Accumulated Precipitation Percent of Average 97 95 92 89 83 80 80 86 87 96 113 115 121 123 121 116 116 111 107 106
Accumulated Precipitation Percentile (non-exceedance) 53 46.9 40.9 35.7 24.8 20.3 19.9 27 28.5 45.1 73.7 79 90 92.3 92.5 89.2 89.9 83.3 76.2 72.3
Standardized Precipitation Index 0.07 -0.08 -0.23 -0.36 -0.68 -0.83 -0.84 -0.61 -0.57 -0.12 0.63 0.81 1.28 1.42 1.44 1.24 1.28 0.97 0.71 0.59