El Verano is a census-designated place in Sonoma Valley, Sonoma County, California, United States. The population was 4,123 at the 2010 census, falling to 3,867 at the 2020 census. El Verano's name is Spanish and means "The Summer." Resorts in El Verano, and the other nearby communities of Boyes Hot Springs, Fetters Hot Springs, and Agua C…El Verano is a census-designated place in Sonoma Valley, Sonoma County, California, United States. The population was 4,123 at the 2010 census, falling to 3,867 at the 2020 census. El Verano's name is Spanish and means "The Summer." Resorts in El Verano, and the other nearby communities of Boyes Hot Springs, Fetters Hot Springs, and Agua Caliente were popular health retreats for tourists from San Francisco and points beyond until the middle of the 20th century because of the geothermic hot springs found in the area.