opening day of shotgun season last year it rained steady and pretty hard all day. with rain gear on i stayed in my stand and actually saw a lot of deer just browsing through the woods. so you never know what they'll do or how they'll be affected. wet ground also allows for successful still hunting. don't let a little rain stop you, although a blood trail is nonexistent so pay attention to where a hit deer runs and make sure of the shot placement, as always.