Standardized Precipitation Index Table

Northwest Climate Division

Wisconsin, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Nov. 2019)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.84 6.25 12.72 15.91 20.84 24.13 29.71 33.22 34.34 37.08 37.6 39.06 50.03 63.9 72.77 94.73 108.77 148.01 181.85 222.45
Accumulated Precipitation Departure from Normal (in.) 0.1 1.94 4.73 3.98 4.93 3.87 5.88 6.97 6.49 8.31 7.82 8.11 11.13 12.72 10.93 12.7 16.06 24.43 27.49 37.4
Accumulated Precipitation Percent of Average 106 145 159 133 131 119 125 127 123 129 126 126 129 125 118 115 117 120 118 120
Accumulated Precipitation Percentile (non-exceedance) 61.7 86.6 94.8 88.9 89.8 83.5 90.3 92 90.6 94.7 93.9 94.2 97.5 97.5 93.5 93.8 96 98.5 98.5 99.6
Standardized Precipitation Index 0.3 1.11 1.62 1.22 1.27 0.97 1.3 1.41 1.31 1.61 1.55 1.57 1.96 1.96 1.51 1.54 1.75 2.17 2.16 2.63