Not much snow to speak of in the SP... Bryce had a fresh few inches; it does make for a nice contrast.
Weather was nice for December ... mid 30s during the day, teens-low 20s a night. The night I got there (Wednesday) it was down to the single digits early AM, rest of the visit was warmer.
At 8000+ ft in Bryce, it was low 20s during the day, dunno how cold at night - I didn't stay past sundown.
Moved onto Zion now, seen more California plates on the road and in town than Utah. Bryce was mostly California too. One young couple was telling me they made it from Oakland in ~7 hrs - they must have been flying on the highways.