I've installed thousands of feet of cable, exactly zero feet of it outdoors. I can't vouch for it'* moisture resistance.
However, you could install some weatherproof conduit on or under the ground. Again, outdoor cabling is not my specialty, but PVC pipe should suffice if properly sealed.
In either case, do not exceed 330 feet of cable without an active (powered) signal repeater, and avoid any embedded power lines and sources, as regular Cat5e is unshielded.