It is possible to cool your house without air conditioning.
The secret is effective use of fans, specifically fans which remove the hot air from your attic, and fans which exchange the hot air in your house with cool air from outside.
There are a few articles on this website which help explain how this works and you do it in your home.
I hope you find this series of articles both interesting and useful.
And speaking of a whole house fan and/or an attic fan for your home ….. we would love to install one for you when you live in or near San Jose.