Standardized Precipitation Index Table

West Central Lower Climate Division

Michigan, Climate Division 05

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.66 4.53 6.89 8.58 10.72 15.45 16.67 19.89 23.98 25.39 26.54 29.53 38.09 47.28 68.34 82.08 103.52 133.88 179.9 219.73
Accumulated Precipitation Departure from Normal (in.) 1.48 0.69 0.91 0.34 -0.39 1.14 -1.02 -0.92 0.38 -1.34 -3.31 -3.22 -0.64 0.15 2.73 2.14 5.12 2.68 15.84 22.88
Accumulated Precipitation Percent of Average 168 118 115 104 97 108 94 96 102 95 89 90 98 100 104 103 105 102 110 112
Accumulated Precipitation Percentile (non-exceedance) 90.3 73.6 73.3 59.9 46.7 67 41.4 43.1 55.9 39.6 23.7 25.8 46.7 52.7 66 61.5 71.2 60 86.7 91.4
Standardized Precipitation Index 1.3 0.63 0.62 0.25 -0.08 0.44 -0.22 -0.17 0.15 -0.26 -0.72 -0.65 -0.08 0.07 0.41 0.29 0.56 0.25 1.11 1.37