Standardized Precipitation Index Table

North Central Climate Division

Wisconsin, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of Apr. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.85 8.22 9.42 11.08 12.82 14.27 15.65 18.62 21.85 25.4 32.04 33.55 41.72 46.8 69.8 78.23 95.93 130.78 164.25 196.47
Accumulated Precipitation Departure from Normal (in.) 3.25 3.91 4.07 4.61 5 4.48 3.18 2.34 1.66 1.27 3.54 1.47 4.32 4.95 5.63 4.31 -0.3 2.4 3.7 3.76
Accumulated Precipitation Percent of Average 225 191 176 171 164 146 126 114 108 105 112 105 112 112 109 106 100 102 102 102
Accumulated Precipitation Percentile (non-exceedance) 99 98.8 98.2 99 98.8 96.4 89.3 77.9 69.2 63.9 79.6 64 80.6 83.1 79.8 73.2 49.7 60.5 63.7 62.8
Standardized Precipitation Index 2.33 2.27 2.11 2.31 2.26 1.8 1.24 0.77 0.5 0.36 0.83 0.36 0.86 0.96 0.83 0.62 -0.01 0.26 0.35 0.33