I've got one that spent a week outside running in crappy weather that is still reliable 15yrs later. I'd say the gas tank acts as a roof and the engine running keeps everything pretty dry. A couple posts and a tarp would make a decent tent and they wouldn't take up much room in the garage for storage.I’ve actually got two. If it ever rains I’ll have no choice but to put it in the garage. But I am gonna run a pipe for the exhaust and I have two windows I can open. I know that ain’t smart but I can’t get it wet. Unless they make a cover I can put on it to protect it while it runs.