Standardized Precipitation Index Table

Southwest Climate Division

Wisconsin, Climate Division 07

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.) 4.54 10.84 15.09 16.67 20.34 21.21 22.39 24.08 26.33 32.25 42.64 45.92 62.94 70.51 99.81 122.54 132.64 184.75 226.76 256.78
Accumulated Precipitation Departure from Normal (in.) 0.55 2.34 2.65 1.15 2.83 2.54 2.6 2.85 3.06 6.49 13.03 12.34 16.94 18.29 32.74 36.87 32.23 50.94 59.72 56.56
Accumulated Precipitation Percent of Average 114 128 121 107 116 114 113 113 113 125 144 137 137 135 149 143 132 138 136 128
Accumulated Precipitation Percentile (non-exceedance) 67.2 81.6 79.4 64.5 76.9 74.4 74.6 75.7 76.9 90.9 98.5 97.2 98.7 98.8 100 100 99.8 100 100 100
Standardized Precipitation Index 0.45 0.9 0.82 0.37 0.74 0.66 0.66 0.7 0.74 1.33 2.16 1.91 2.22 2.25 3.36 3.37 2.82 3.7 3.98 3.61