September brought an average of 4.23 inches of rain to the Great Miami River Watershed. That's 1.07 inches above normal for the month. The high station was Greenville (7.02 inches), and the low station was Hamilton (2.77 inches). As of the end of September, the Great Miami River Watershed had received 33.41 inches of precipitation which is 0.69 inches above normal for this point in the calendar year.