Standardized Precipitation Index Table

South Central Climate Division

Wisconsin, Climate Division 08

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.) 3.4 5.55 8.93 9.65 9.75 10.88 13.98 15.58 17.98 21.5 27.54 36.28 50.65 54.91 71.55 85.72 108.75 137.36 169.43 212.94
Accumulated Precipitation Departure from Normal (in.) -0.22 -1.11 0.2 -0.29 -1.5 -1.94 -0.98 -1.9 -3.16 -3.41 -1.14 3.39 9.03 9.12 5.73 7.03 10.01 5.7 4.79 15.28
Accumulated Precipitation Percent of Average 94 83 102 97 87 85 93 89 85 86 96 110 122 120 109 109 110 104 103 108
Accumulated Precipitation Percentile (non-exceedance) 50.4 33.1 57 48.7 30.6 26.4 40.2 31.1 24.4 25.1 43.5 74.5 92.4 91.7 77.1 79.1 83.4 68.8 64.3 83.3
Standardized Precipitation Index 0.01 -0.44 0.18 -0.03 -0.51 -0.63 -0.25 -0.49 -0.69 -0.67 -0.16 0.66 1.43 1.39 0.74 0.81 0.97 0.49 0.36 0.97