Like some have said, early morning or early evening for me. Yet, that doesn't mean the many kills I have had during high noon ever happened, because i have had many yotes show up 10 a.m., 11 a.m., 12 p.m., even 1 p.m. In the summer here, I have found some patterns with the yote here that on really warm mornings, I have seen and taken down desperate yotes searching for that last meal, or drink. It all depends on the landscape, the biology of the yote, and what draws those yote out, even in the beating sun.