A.G.
My rottweiler is the same way. There's not a lot that I can offer, but what I do is either take her out as soon as I realize the rain is coming, and again as soon as it's over. Or when it's not raining so hard, if I actually walk out in the yard with her, she'll usually cooperate. If I try to stay on the porch or steps, she won't go out there--(such a baby). But usually if I go with her she can be coaxed. Hope that helps. Good luck!!