One day. Today might be the second. Air it out overnight and early morning, then close up and pull the shades. The difference in our home from '07, when trees were 6', to now when the tree SW of our home is 25'+, is significant. My wife is cold even when the heat index tops 100, so...You guys have your AC on already?
Soon, when the humidity becomes unrelenting the AC be locked on save for those breezy nights after a strong cold front.