Looking at the atlas and my big hardiness
zone map, it looks like you are in
zone 8. Even though you may get freezing temperatures, it probably won't kill all the buds or maybe not any of them. What stage are the buds at? Buds showing no color are hardier than buds showing color and buds that show color but are still tight are hardier than buds that are opening up.
Climbing
roses require little pruning, and since yours are so young I would say none at all, except for the removal of any dead wood and perhaps heading back of weak wood. You already have a good first seasons growth of long stems. This is normal. This
spring buds along those stems will grow and side branches will form and your
roses will start to fill in. Also, you will probably get more long branches generating from the base of the
plant. Any pruning you would do now or in March would be cutting off
flower buds and potential side branches which would
flower in subsequent years.
The exception would be on the small flowering branches from last year that grew off the canes. If you really wanted to, you could cut these small branches back to about 6 inches, but it's not really necessary.
You don't want to make any cuts into strong vigorous canes as this will stimulate strong branching from just below those cuts and you will ruin the shape of your
rose.
When canes become very old, you should remove them completely to the base of the
plant to stimulate new replacement growth. Generally you do this after you notice a reduction in flowering of an older branch.