Standardized Precipitation Index Table

Northwest Climate Division

Wisconsin, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.67 6.45 8.75 10.74 11.04 12.1 15.14 16.8 21.33 27.8 30.99 35.92 48.3 52.68 73.3 86.6 105.06 143.93 183.86 214.74
Accumulated Precipitation Departure from Normal (in.) -0.67 -1.46 -1.58 -1.19 -1.81 -1.75 0.11 0.03 1.99 4.79 4.03 4.99 7.02 7.88 11.48 10.93 12.38 20.39 29.5 29.6
Accumulated Precipitation Percent of Average 84 82 85 90 86 87 101 100 110 121 115 116 117 118 119 114 113 117 119 116
Accumulated Precipitation Percentile (non-exceedance) 38.3 27.7 30.3 36.7 29.8 30.3 54.2 52.9 73.8 90.2 83.4 85.6 88.9 90.6 94.5 91.3 91.4 96.7 99 98.5
Standardized Precipitation Index -0.3 -0.59 -0.52 -0.34 -0.53 -0.52 0.1 0.07 0.64 1.29 0.97 1.06 1.22 1.32 1.6 1.36 1.36 1.83 2.33 2.16