Clematis montana var. rubens is hardy in these areas:

Allegan, MI	Allentown, PA	Alsip, IL
Athens, MI	Augusta, MI	Baltimore, MD
Bangor, MI	Battle Creek, MI	Bayside, NY
Bellmore, NY	Bellport, NY	Bethpage, NY
Blue Point, NY	Bohemia, NY	Brentwood, NY
Brightwaters, NY	Bronxville, NY	Brookhaven, NY
Canton, MI	Channahon, IL	Charlottesville, VA
Chicago Heights, IL	Chicago Ridge, IL	Chicago, IL
Cicero, IL	Cleveland, OH	Coal City, IL
College Point, NY	Conneaut, OH	Corona, NY
Crete, IL	Detroit, MI	Dewitt, MI
Dimondale, MI	Dolton, IL	Dorset, OH
Eagle, MI	East Claridon, OH	East Elmhurst, NY
East Greenville, PA	East Lansing, MI	East Texas, PA
Eastchester, NY	Easton, PA	Eaton Rapids, MI
Ecorse, MI	Edmore, MI	Elkins Park, PA
Elmhurst, NY	Elmwood Park, IL	Elyria, OH
Emmaus, PA	Evergreen Park, IL	Ferndale, MI
Flushing, NY	Forest Hills, NY	Fort Eustis, VA
Fresh Meadows, NY	Glen Burnie, MD	Grand Rapids, MI
Greenlawn, NY	Gwynn Oak, MD	Hamtramck, MI
Harper Woods, MI	Harrison Township, MI	Hastings On hudson, NY
Highland Park, MI	Holbrook, NY	Holtsville, NY
Hunt Valley, MD	Huntington Station, NY	Huntington, NY
Islandia, NY	Jackson Heights, NY	Kalamazoo, MI
Lakewood, OH	Landisburg, PA	Lawn, PA
Leasburg, NC	Lebanon, PA	Lemoyne, PA
Lewistown, PA	Lexington, NC	Liberty, NC
Linwood, NC	Little Neck, NY	Liverpool, PA
Loysville, PA	Lykens, PA	Macomb, MI
Marysville, MI	Maspeth, NY	Mcalisterville, PA
Melville, NY	Memphis, MI	Memphis, TN
Mentor, OH	Middle Village, NY	Middlefield, OH
Montville, OH