LOL ... Exact same thing happened to me yesterday and if anything I had unintentionally OVER-watered the night before. My plants looked pretty droopy and sorry for themselves yesterday afternoon, but today they are looking real green and perky again, and they have grown quite a bit into the bargain. Don't think the rain did any harm at all (they are only 2 1/2 weeks old btw).
Make sure your drainage is good, and if you feel they need drying out a bit I would still recommend keeping them outdoors, or if inside get a fan going. The air movement will help them transpire and get rid of any excess water as quickly as possible and, therefore, prevent your roots staying water-logged and rotting.
greenb.