Roses vary in their cold hardiness and some need extra care to help them survive winter temperatures. Soil moisture prior to a hard freeze lessens damage to roots. Cut canes back by one-third only if they are tall and could be damaged by snow loading.
Some roses will continue to bloom late into the fall. To harden for winter, reduce watering to slow growth. Additional winter protection is often recommended particularly for hybrid tea and grandiflora roses. Wait until late fall to early winter before adding mulch to the crown and graft of the rose. Scoop several shovels of soil or compost/bark mulch up over the crown to a depth of 6 to 8 inches.
Mulching is particularly important in late winter and early spring to protect crowns from extreme changes in temperatures.