[apothegm]

This is very clever!

That said, depending on the construction type of the building you’re in, it may not be accurate.

For me, if it’s chilly overnight and only a bit too hot during the daytime, the best play is to open the windows to the too cold air in the morning; blow it through thoroughly; then shut the windows around 9am, before it starts to get meaningfully warmer. That traps the cool air inside and can sometimes get you through a full day without AC when having the windows open would be far too hot.

But that works far better in brick or concrete construction than wood.