Heat 62 night, 66 day
Cool 74 night, 75-76 day
Use ceiling fan in den and bedrooms.
In winter, sleep with heavy comforter. Turn heat to 68 upon awakening to get rid of chill. Then turn it back down to 65 or 66 as 68 feels too hot.
Evaporative coolers do not work so well once the outside temperature gets into high 90's and house can heat up to 78 to 80. Then have to rely more on ceiling fans. If I wake up early or stay up very late, I can open windows and doors and take advantage of the high desert summer morning coolness.