Ohio Precipitation Map

Precipitation is critical to the growth and health of trees and forests. Both quantity and timing of precipitation is important. As an example, receiving a “normal” amount of rainfall in a given year may be of little value if it occurs in a few heavy storm events compared to a number of smaller rainfall events throughout the growing season. Likewise, extremes in precipitation amounts, whether too little or too much, can stress trees, weakening them and reducing their resistance to insects and diseases.

Rainfall and climatological data for Ohio, including monthly water inventory reports, is available at the ODNR, Division of Water website.