I wouldn't. Are you somewhere where there may be snow/cold weather? If so, practical shoes or boots, nice slacks in a somber color, and a blazer, turtleneck sweater, or nice sweater under your winter coat.
If you are in a warm climate, slacks and a suitably subtle jacket. I just don't think jeans are appropriate for graveside. Skirts and dresses are, of course, OK too.