Fort Union Road   This part of New Mexico is always a pleasure to visit during hiking season. The high level of rainfall makes Fort Union Road a pretty wet spot. September is the wettest month with most rain, and May is the month with the least moisture. During the warm months, highs mostly are in the 80's at Fort Union Road. All through the moonlight hours it's usually in the 70's. All through the wintertime highs are commonly in the 80's; all through the dark hours in the wintertime at Fort Union Road temperatures dip to the 70's. Be the first to review Fort Union Road SUBMIT INPUT