Surprisingly, yes I am. My favorite moment was being near Jamestown, CA at a christian camp in the mountains (It wasn't my choice). I walked around in shorts and a short-sleeved shirt while it was snowing and well within 15-20 degrees outside. I also walked in the creek to look for a penny I saw from a bridge, sadly I never found it, but I did find a battery.
Are you fairly cold-resistant?