Roger Shoaf wrote:

Pehaps a better approach would be to open windows in the early morning
letting the cool morning air into the house, and then shut the drapes
and windows on the south side of the house in the morning as the sun
hit them.

By doing this you can avoid any AC use.

It works for me so well, I've never needed to install A/C. The inside temp will
lag the outside by 15 or more degrees F, keeping it quite confortable.

In Seattle, admittedly.