There are 7(!) days on that run out of the first 8 days of July where I don’t get to 70, and a few of them I don’t even get to 60. Again, a high in the 50s in July has occurred once in Pittsburgh.
What that run actually does is it sets up that trough, but then reinforces it with a second, stronger trough out of the upper Midwest. But clearly it’s not without rain, so that gets in the way of the 4th.
CMC is on board with the trough too.