Standardized Precipitation Index Table

Southeast Lower Climate Division

Michigan, Climate Division 10

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.) 2.15 2.61 6.92 9.33 10.81 13.83 15.66 21.64 27.58 30.23 31.35 35.26 44.31 48.72 65.26 80.66 105.36 135.72 176.53 212.64
Accumulated Precipitation Departure from Normal (in.) -0.09 -1.3 1.18 1.52 0.62 1.13 0.01 2.94 5.8 5.13 2.97 4.01 7.33 4.73 2.74 5.45 11.6 10.8 20.43 25.41
Accumulated Precipitation Percent of Average 96 67 121 119 106 109 100 116 127 120 110 113 120 111 104 107 112 109 113 114
Accumulated Precipitation Percentile (non-exceedance) 52.1 17.2 77.5 79.5 63.2 68.4 52.7 81 92.7 89 76.1 81.3 92.4 80.9 67.3 77.1 91.1 85.1 94.9 96
Standardized Precipitation Index 0.05 -0.94 0.76 0.82 0.34 0.48 0.07 0.88 1.46 1.23 0.71 0.89 1.43 0.87 0.45 0.74 1.34 1.04 1.63 1.76