December delivered an average of 4.68 inches of precipitation to the Great Miami River Watershed ― 1.57 inches above the monthly average. The high station was Hamilton (6.04 inches) and the low station was Huffman Dam (3.63 inches). Total 2021 precipitation for the Great Miami River Watershed was 44.15 inches which is 2.23 inches above the 1991 – 2020 average.
