Standardized Precipitation Index Table

South Central Climate Division

Wisconsin, Climate Division 08

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.) 5.2 9.58 14.45 16.66 19.76 20.71 22.37 24.04 26.34 32.37 39.84 44.33 58.99 65.98 94.3 117.53 129.02 178.46 218.92 249.57
Accumulated Precipitation Departure from Normal (in.) 1.45 1.63 2.86 2.03 3.1 2.84 3.18 3.25 3.4 6.91 10.71 11.43 14.53 15.23 28.56 33.97 30.57 47.28 55.14 53.21
Accumulated Precipitation Percent of Average 139 120 125 114 119 116 117 116 115 127 137 135 133 130 143 141 131 136 134 127
Accumulated Precipitation Percentile (non-exceedance) 83.3 76.4 82.4 73.3 80.3 77.9 79.7 79.2 79.8 92.4 97 96.9 98.1 98 99.9 99.9 99.7 100 100 100
Standardized Precipitation Index 0.97 0.72 0.93 0.62 0.85 0.77 0.83 0.81 0.83 1.43 1.88 1.86 2.07 2.05 3.11 3.26 2.74 3.56 3.78 3.41