It isn't all sweetness and light
in the desert in the winter.
That is ice on the fountain in Yuma. LOL
Of course it does get into the 70-80s during the day.
We have gone south every year since 2010. Usually to down I-5 or 101 depending on the weather in Siskiyou pass.
El Monte, CA, Yuma, Tucson, Apache Junction, sometimes Wickenburg, Kingman and the "west coast" of Arizona, Bullhead City, etc.
We did drive through Death Valley and out CA 190 to Mojave and usually, because of snow thru Tehachapi Bakersfield and up the I-5 or 101 to home