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 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.51 5.28 8.84 9.75 10.15 11.39 14.83 16.52 17.69 22.11 25.81 33.24 43.45 45.71 62.35 77.21 94.77 129.54 161.81 199.25
Accumulated Precipitation Departure from Normal (in.) -2.07 -0.88 0.98 0.86 0.14 0.04 1.51 0.51 -2.14 -1.63 -1.88 1.2 3.55 2.3 -1.75 1.73 -1.43 1.2 1.33 6.6
Accumulated Precipitation Percent of Average 42 86 112 110 101 100 111 103 89 93 93 104 109 105 97 102 99 101 101 103
Accumulated Precipitation Percentile (non-exceedance) 3.5 33.7 71.3 67.9 55.4 53.5 73.7 59.4 28.3 36 35.5 61.9 75.9 67.6 41.2 60.3 44.4 55.8 55.6 71.2
Standardized Precipitation Index -1.82 -0.42 0.56 0.46 0.14 0.09 0.63 0.24 -0.57 -0.36 -0.37 0.3 0.7 0.46 -0.22 0.26 -0.14 0.15 0.14 0.56