My dogs will go out in the rain (and come in drenched, haha!) but Sammy really does not like thunder. He always lets us know a good half hour before a storm is coming our way. He's getting better, though, he no longer runs and hides in the basement, he just leans on my legs and trembles.My Bella is like that. Doesn't mind going in tbe snow, but if it's raining....