Mean annual precipitation ranges from 33 to 42 inches. The very poorly drained Brookston and Kokomo soils are in drainageways. The moderately well drained Corwin soils have a dark surface and are on adjoining landscapes. The somewhat poorly drained Crosby and Fincastle soils are on lower positions of the landscape. In addition, Fincastle soils have more than 18 inches of loess.
Miamian soils are well drained and are on higher landscape positions.
Milton soils are well drained and are on areas where bedrock is less than 40 inches. Odell and Randolph soils are somewhat poorly drained and on lower positions of the landscape. In addition, Randolph soils are on areas where bedrock is less than 40 inches. The moderately well drained Xenia soils have more than 18 inches of loess and are on adjacent landscapes. Moderately well drained.