Standardized Precipitation Index Table

West Central Climate Division

Wisconsin, Climate Division 04

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.) 3.4 9.77 14.28 16.19 18.92 19.58 20.58 22.68 24.88 30.11 36.44 39.98 57 65.68 86.76 103.9 116.72 165.12 204.6 239.61
Accumulated Precipitation Departure from Normal (in.) -0.48 1.34 1.98 1.08 1.99 1.68 1.67 2.57 3.03 5.8 8.35 7.93 12.66 15.74 22.71 22.02 20.8 37.24 44.9 48.17
Accumulated Precipitation Percent of Average 88 116 116 107 112 109 109 113 114 124 130 125 129 132 135 127 122 129 128 125
Accumulated Precipitation Percentile (non-exceedance) 43.8 73.3 75.9 64.8 72.9 69.6 69.4 76.3 79.8 91.4 95.3 93.3 97.3 98.7 99.8 99.3 98.5 99.9 99.9 99.9
Standardized Precipitation Index -0.16 0.62 0.7 0.38 0.61 0.51 0.51 0.71 0.83 1.37 1.68 1.5 1.92 2.22 2.81 2.47 2.17 3.06 3.26 3.2