The best time for a mid day sit is during the rut or during mild rain/snow. The wind seems to be less of a factor during these times as well. Over the past few seasons I've seen more bucks move during the middle of a rainy day or snow storm than any other time during those days. But wind almost always plays a role in the hunt so always try to plan accordingly but you should have a better chance during these conditions even with a bad wind because the buck is distracted by either the urge to breed or the in-climate weather.