I think every night except one this week, I've been able to do that. The one night I couldn't wasn't because it didn't get cool enough in the night. It just didn't get cool enough before bedtime and I've had to be careful leaving windows open because of the frequent wind and rain that we've had at night. If windows are open more than a crack, the wind can blow the rain inside and flood things, so I close the windows to only a crack at bedtime.

Most nights I've gotten a good 3 hours of windows wide open cooling the house, which is really nice.