Standardized Precipitation Index Table

Southwest Climate Division

Wisconsin, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Apr. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 7.72 10.37 10.97 12.78 13.74 15.01 16.25 17.94 23.06 29.05 35.18 38.08 44.94 50.99 77.74 88.68 104.41 141.03 171.4 206.73
Accumulated Precipitation Departure from Normal (in.) 4.61 5.23 4.69 5.37 4.93 4.15 2.92 0.81 1.96 3.91 5.54 4.52 5.14 6.54 10.59 10.66 3.72 6.72 3.46 5.12
Accumulated Precipitation Percent of Average 248 202 175 173 156 138 122 105 109 116 119 113 113 115 116 114 104 105 102 103
Accumulated Precipitation Percentile (non-exceedance) 99.3 99.2 98.3 99 97.6 93.1 84.8 61.1 68.7 79.4 85.1 78.9 79.7 84.5 89.4 88.1 64.9 70.9 60.5 63.5
Standardized Precipitation Index 2.45 2.43 2.13 2.32 1.97 1.48 1.03 0.28 0.49 0.82 1.04 0.8 0.83 1.02 1.25 1.18 0.38 0.55 0.27 0.35