240 thousand years ago.
As luck would have it this leap takes us out of your interglacial, right past the previous glacial (the second most recent of the recent block of four ice ages), and lands us right back into an interglacial.
So its relatively balmy again.
This is shorty before, or at about the time, that anatomically modern people first appeared in southern Africa(around 200 thousand years ago). Folks who looked like us may have been emerging, but there were few of them.
Mitochondrial adam lived a little before that time, and mitochondrial eve a little after that date.