Clematis virginiana is hardy in these areas:

Alsip, IL	Baltimore, MD	Bayside, NY
Bronx, NY	Brooklyn, NY	Brownsville, TX
Canton, MI	Chicago, IL	Cicero, IL
College Point, NY	Conneaut, OH	Corona, NY
Detroit, MI	Dorset, OH	East Claridon, OH
East Elmhurst, NY	East Greenville, PA	East Texas, PA
Easton, PA	Ecorse, MI	Elmhurst, NY
Elmwood Park, IL	Elyria, OH	Emmaus, PA
Evergreen Park, IL	Ferndale, MI	Florence, SC
Flushing, NY	Forest Hills, NY	Fort Eustis, VA
Fresh Meadows, NY	Glen Burnie, MD	Gwynn Oak, MD
Harper Woods, MI	Harrison Township, MI	Highland Park, MI
Hunt Valley, MD	Jackson Heights, NY	Leasburg, NC
Lexington, NC	Liberty, NC	Linwood, NC
Little Neck, NY	Macomb, MI	Marysville, MI
Maspeth, NY	Memphis, MI	Middle Village, NY
Morgantown, WV	Mount Clemens, MI	New Baltimore, MI
New Haven, MI	New York, NY	Newport News, VA
North Ridgeville, OH	North Street, MI	Nottingham, MD
Oakland Gardens, NY	Parkville, MD	Philadelphia, PA
Pikesville, MD	Rego Park, NY	Ridgewood, NY
Riverdale, IL	Rosedale, MD	Sparrows Point, MD
Staten Island, NY	Taylor, MI	Temperance, MI
Towson, MD	Trenton, MI	Virginia Beach, VA
Wayne, MI	Westland, MI	Whitestone, NY
Whitmore Lake, MI	Woodside, NY