Weather in Chantilly

Chantilly is a census-designated place in Fairfax County, Virginia, United States. Located in the Washington, D.C. metropolitan area, it is a suburb of Washington, D.C. The population was 23,039 as of the 2010 census. The climate in Chantilly is humid subtropical, with warm summers and mild winters. Rainfall is abundant throughout the year. The average temperature ranges from the low 30s in the winter to the mid-80s in the summer. The average high temperature in July is 88°F (31°C) and the average low is 66°F (19°C). The average high temperature in January is 45°F (7°C) and the average low is 28°F (-2°C).