Yuma is a town of about 100,000 (250k+ during wintertime) in the southwest corner of Arizona. Yuma is the sunniest place in the continential United States, averaging more days of sun per year than anywhere else. Climate-wise, it's rather nice in spring, fall, and winter, but once summer hits, the tourists bolt and the heat rises upwards of 125 degrees. It is quite close to both California and Mexico.