Standardized Precipitation Index Table

West Central Climate Division

Wisconsin, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.07 7.07 9.99 10.57 10.73 12.02 15.02 16.18 17.38 22.9 27.61 34.97 46.54 49.12 66.54 81.71 98.74 132.73 162.66 203.82
Accumulated Precipitation Departure from Normal (in.) -0.82 0.36 1.44 1.05 0.21 0.3 1.55 0.27 -2.26 -0.72 0.1 2.92 5.96 5.33 2.45 5.89 2.6 4.5 2.33 11.37
Accumulated Precipitation Percent of Average 79 105 117 111 102 103 112 102 89 97 100 109 115 112 104 108 103 104 101 106
Accumulated Precipitation Percentile (non-exceedance) 33.9 60.7 76.1 69.6 56.5 57.5 73.6 56 28.4 45.2 53.1 73.7 85.4 82.1 64.5 77.5 62.2 66.3 58 78
Standardized Precipitation Index -0.41 0.27 0.71 0.51 0.16 0.19 0.63 0.15 -0.57 -0.12 0.08 0.63 1.05 0.92 0.37 0.75 0.31 0.42 0.2 0.77