It's okay to trim it now,it's not cold out yet. You are supposed to actually trim them at the end of the season so they come in fuller next season.
Is It Ok To Prune Rose Bush This Late In Season, Or Should I Wait Until Late Winter/early Spring?
I use the thermometer as a guide to pruning my roses.I live in southern Ontario.I generally wait until the plants are completely frozen(32f) or less for an extended period of time,usually a frozen week in December or January.Start on the fist frozen day,hoping the weather forecast says it will stay cold for several more days,first.This may go against the grain of many beliefs,but this has worked favorably for me now since we moved here 7 years ago,with more blooms than I ever expected.Have a warm winter,good luck!
I would wait until spring after the last frost. When you prune them right before winter there is a chance in the bush sending out new growth on warm days, and could kill the bush. You could probably trim it now and it would be fine, but the best time to trim is in spring.