Do you mean 'Clematis', Judita? Two issues: unless you're in the very coldest part of the USA, most Clematis will survive the winter outside in the soil. The caveat is that a few Clematis are not completely hardy. So, to answer you properly, we need to have more information.

Agree with previous answer - we need the variety of clematis to answer properly, and preferably, your USDA zone.

But, don't suddenly put it outdoors in the cold now, if it's been indoors for a while.