Standardized Precipitation Index Table

Northwest Climate Division

Minnesota, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of May 2021)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.14 2.76 3.02 3.17 3.47 4.03 4.3 5.25 6.2 10.43 16.12 21.07 23.72 26.18 46.98 54.92 70.34 89.39 115.6 137.5
Accumulated Precipitation Departure from Normal (in.) -1.52 -1.47 -2.09 -2.49 -2.84 -3 -3.63 -4.32 -5.76 -4.52 -2.14 -0.96 -3.43 -2.82 2.99 3.91 4.39 1.49 5.74 5.69
Accumulated Precipitation Percent of Average 43 65 59 56 55 57 54 55 52 70 88 96 87 90 107 108 107 102 105 104
Accumulated Precipitation Percentile (non-exceedance) 11 19.7 10.2 6.4 4.3 3.6 1.5 1.3 0.5 3.7 24.9 40.9 18.5 22.8 73.5 78 76.2 58.7 74 71.1
Standardized Precipitation Index -1.23 -0.85 -1.27 -1.52 -1.72 -1.79 -2.18 -2.23 -2.56 -1.79 -0.68 -0.23 -0.9 -0.75 0.63 0.77 0.71 0.22 0.64 0.56