it was yesterday Friday Dec 6 2013 and the early morning temp was like 28 degrees. I don't think it got past 40 along Red Rock Canyon Road. I stayed at the "Element" Westin hotel near I-215 on Town Center. The 13 mile loop is spectacular. Elevation is in the 4,000 foot range. First 5 miles is climbing and then it tapers off for some good descents.
Wind chill hits me on the descents, even with merino wool base layer. Ears and toes (with covers) still got cold.