How can I cover my windows to block the afternoon sun out?

Hi Linda, you might consider purchasing drop cloths in a size larger than you need. You could create a rod for those using various types of products, aluminum conduit, PVC pipe, wooden dowels, and make grommets across the top of the material so you could slide the "curtain" across to create shade or block the sun when needed. The canvas type drop cloths are fairly heavy duty and could be laundered, or taken down in the winter when not needed. Just a thought and likely less permanent and less expensive than blinds or shutters.

Have you considered outdoor awnings? You could also install plantation shutters indoors for easy access to open and close them as the sun comes and goes. Plantation shutters will block out most of the sun to give you some relief.

My living room windows face due west. I used a dual rod with sheers and lined drapes.