Ya, especially in Colorado BRRRRRRR
I drove to Moab one year with only a Duster cover and a Bikini top, I about
froze to death once I left California, I left with 70-80* weather and ended
up in snow covered peaks at 7000' no amount of heater did any good, I had
on my jacket and motorcycle gloves, and put all the spare clothes I could find
on my legs to try and keep warm, needless to say it was a miserable trip that
year.
Wild