Ed Pawlowski wrote, on Sat, 30 Aug 2014 10:59:45 -0400:

You don't want to suck in 95 degree humid air if the house is 70
degrees from the night before.

This is a good point.
It's generally 10 degrees (or so) cooler at dawn and dusk than during
the day, but during the day, it's hotter outside than inside (summer).