Kathleen and others, I have asked about charging in the rain on the Tesla owners' forum. It can be done, has been done, and no one has documented problems charging in the rain. Would have more reservations in a thunder storm, but even then it has been done. So, use your judgement. If it's the kind of rain that will be going on for hours I'd probably be willing to plug Tessie in. I'm not sure I'd want to go out in the middle of a thunder storm to plug her in. Would probably use the guest/owner's discretion, and let them read your instruction book..