I was just checking out your weather out there
Sacramento, California (CA) profile:
and when I saw the average temperature plot,
I just choked on my coffee!!
The first thing that came to mind, was long sleeve shirts..
I wonder if you could use some Sun Block material over your windows during the summer
Phifer 60 in. x 50 ft. Charcoal Super Solar Screen - 3001972 at The Home Depot
It comes in different widths and seems like it could be installed in (insect) screen frames.
One of our posters used this material and likes it. I recommended he move
the 'screens' inside to absorb heat (and heat the room) during the winter..
Insect Screens
"Super Solar Insect Screens, These dual purpose screens are the ultimate in insect screen technology because it looks like a screen but acts like a shade. It keeps insects and bugs out while being able to reduce your summer cooling bills by reducing the sunlight that comes into your home by up to 90%."
And, you can say cool stuff like, 'Duuude, my house is wearing Sunglasses'..