Standardized Precipitation Index Table

West Central Climate Division

Wisconsin, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.36 2.74 4.03 5.46 8.56 12.88 17.85 24.13 27.04 30.99 33.91 34.49 38.94 46.82 70.86 84.08 101.33 133.61 164.76 196.57
Accumulated Precipitation Departure from Normal (in.) 0.36 0.55 0.09 -0.91 -1.53 -1.2 -0.13 1.6 0.63 1.75 2.84 2.45 2.9 0.63 6.74 5.82 5.18 5.39 4.42 4.13
Accumulated Precipitation Percent of Average 136 125 102 86 85 91 99 107 102 106 109 108 108 101 111 107 105 104 103 102
Accumulated Precipitation Percentile (non-exceedance) 77.1 75.4 57.6 37 34.6 40.4 51.9 65.9 57.4 65 71.7 69.1 71.8 55.7 81.9 76.4 72 69 64 61.8
Standardized Precipitation Index 0.74 0.69 0.19 -0.33 -0.4 -0.24 0.05 0.41 0.19 0.38 0.57 0.5 0.58 0.14 0.91 0.72 0.58 0.5 0.36 0.3