Hi Joanne, I didn't find anything about him in the Census records but I really didn't think I would since he was in the state so early. I'd contact the Solano County Genealogical Society, rootsweb.ancestry.com/~cascgsi/leftside.htm .
Also you could look at the Surname Message Boards for Winemann. If there isn't a Winemann Message Board, you can request that one be created. Successful Searching!