How to fix my iphone 5c's audio?

Today I was listening to music and the speakers were working as usual. I went outside in the snow and my speakers no longer work, I turn up my volume and it says I have headphones in how can I fix this?

Have you tried to put headphones in and remove them? Try shutting down your phone and leave it in some rice for a few days. That might remove any water that could be trapped inside. If all else fails, purchase a little speaker.

http://www.brookstone.com/pop-up-mini-speaker-with-fm-tuner