sentences:  The lowest elevations occur within the valleys of the escarpment and in the broader valleys of the Blue Ridge Plateau.The mean annual temperature of the county is 55.1 °F, with a range from 50.3 to 57.9 °F depending on the elevation, with higher temperatures occurring at lower elevations and lower temperatures in the higher mountains.The month of July is the hottest in the county, with a mean temperature of 72.6 °F and a mean range of 66.6 to 75.8 °F.