Standardized Precipitation Index Table

Northwest Climate Division

Ohio, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.74 9.04 12 13.55 14.87 18.49 20.92 21.69 23.58 26.3 28.87 32.39 45.74 52.35 68.39 84.65 102.41 144.91 173.34 212.72
Accumulated Precipitation Departure from Normal (in.) 1.1 2.14 2.28 1.92 1.03 2.22 2.08 0.35 -0.69 -1.07 -2.13 -2.39 1.27 1.31 -1.19 -1.11 -1.91 5.86 -0.37 4.27
Accumulated Precipitation Percent of Average 130 131 124 117 107 114 111 102 97 96 93 93 103 103 98 99 98 104 100 102
Accumulated Precipitation Percentile (non-exceedance) 79.2 87 84.7 78.5 66.4 78.2 74.6 56.2 44.7 41.2 33.1 32.2 60.9 60.3 44.5 45.2 42.1 72.8 49.5 63.9
Standardized Precipitation Index 0.81 1.12 1.02 0.79 0.42 0.78 0.66 0.15 -0.13 -0.22 -0.44 -0.46 0.28 0.26 -0.14 -0.12 -0.2 0.61 -0.01 0.36