sentences:  According to the 2010 census, the county has a total area of , of which (or 99.23%) is land and (or 0.78%) is water.In recent years, average temperatures in Rochester have ranged from a low of in January to a high of in July, although a record low of was recorded in January 1985 and a record high of was recorded in July 1980.Average monthly precipitation ranged from in February to in May.