sentences:  Senators for Indiana, both from Pike County.According to the 2010 census, the county has a total area of , of which (or 97.99%) is land and (or 2.01%) is water.In recent years, average temperatures in Petersburg have ranged from a low of in January to a high of in July, although a record low of was recorded in December 1989 and a record high of was recorded in September 2002.