Mean annual air temperature is about 55 degrees F. Mean annual precipitation is about 42 inches. These are the Catoctin , Purcellville , Swampoodle , and Tankerville series. Tankerville and Catoctin soils are on similar landforms and are shallower to lithic or paralithic contact. Purcellville soils are on gently sloping ridgetops and contain more than 18 percent clay in the particle size control section. Swampoodle soils are in adjacent upland drainageways and are moderately well drained.
Philomont soils are well drained.
Runoff is medium, Permeability is moderate to moderately rapid. The majority of the Philomont soils are cultivated and used for permanent pasture or row crops. A significant area has been developed for residential use. A small area is in woodland. Corn is the principle row crop.