Standardized Precipitation Index Table

Central Lower Climate Division

Michigan, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Feb. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.76 3.67 5.32 7.13 10.24 11.38 16.03 22.57 24.43 25.14 29.13 31.79 38.53 45.39 66.43 80.19 100.11 132.22 174.47 211.76
Accumulated Precipitation Departure from Normal (in.) -0.75 0.38 0.1 -0.53 -0.23 -2.28 -0.82 2.87 1.56 -0.9 0.26 0.83 2.29 0.69 4.46 4.48 7.15 8.3 19.58 25.99
Accumulated Precipitation Percent of Average 50 112 102 93 98 83 95 115 107 97 101 103 106 102 107 106 108 107 113 114
Accumulated Precipitation Percentile (non-exceedance) 16.2 66.3 56.5 43.4 49.2 22.7 42.3 80.3 68.1 42.6 54.4 59.4 69.6 56.6 75.8 72.8 79.7 78.2 93.3 95.6
Standardized Precipitation Index -0.99 0.42 0.16 -0.17 -0.02 -0.75 -0.19 0.85 0.47 -0.19 0.11 0.24 0.51 0.17 0.7 0.61 0.83 0.78 1.5 1.71