Standardized Precipitation Index Table

North Central Climate Division

Wisconsin, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of May 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.58 5.09 7.83 8.31 9.75 13.14 15.15 18.91 25.21 28.55 33.8 37.32 48 54.17 79.68 89.68 111.09 154.47 191.3 227.47
Accumulated Precipitation Departure from Normal (in.) -1.02 -1.05 0.03 -0.52 -0.21 1.85 1.9 2.96 5.38 4.81 6.13 5.29 8.17 10.84 15.64 14.37 15.1 26.49 31.4 35.66
Accumulated Precipitation Percent of Average 72 83 100 94 98 116 114 119 127 120 122 117 121 125 124 119 116 121 120 119
Accumulated Precipitation Percentile (non-exceedance) 24.2 30.2 54 43.5 49.1 79.2 78.2 85.2 92.7 87.8 90.5 86.6 93.2 96.9 98.3 96.5 95.9 99.4 99.7 99.8
Standardized Precipitation Index -0.7 -0.52 0.1 -0.16 -0.02 0.81 0.78 1.04 1.45 1.17 1.31 1.11 1.49 1.87 2.13 1.81 1.74 2.52 2.73 2.93