I have found that when it is raining, it really sets the best mood for reading. A steady rain shower (and especially thunderstorms) usually makes for a boring day. No one likes getting out into the wetness.
So get started on something that you probably rarely have time to sit down and do. Grab a good book, a nice comfortable spot on the couch, and read away. If you have kids, get them involved also. Find their all time favorite book and have them snuggle up. And if they have the annual summer's reading list (there seems to be one every year for grades K-12) choose a book from it to read with them.
Don't let the perfect weather for reading escape you!