It takes quite alot to kill a plant, even small tender ones. It'll just stunt them at most. The rain will prevent the roots from growing, because they won't need to travel to get water. Once it's sunny for a few days, you'll notice a huge improvement. I'd keep them inside if you can, just so their roots can grow more, if you can't keep them inside, or if they're rootbound, then I'd put them outside.