Washington Dulles International Airport is a public airport located 41.6 km west of the central business district of Washington, D.C., in Dulles, Virginia. It serves the greater Washington, D.C., metropolitan area.
Humid “subtropical” climate (Köppen climate classification Cfa) - characterized by hot, humid summers and cool winters. Significant amounts of precipitation occur in all seasons in most areas. Winter rainfall (and sometimes snowfall) is associated with large storms that the westerlies steer from west to east. Most summer rainfall occurs during thunderstorms and occasional tropical storms (hurricanes).