I'm 67 and lost over 50 lbs about 6 years ago. I've stayed at about 140 since than. Like you, I'm always cold! I've learned to routinely wear more layers of clothing that I can shed as needed. In the wintertime when I'm working in my shop I always wear long johns under my work clothes. The extra layers make a big difference.
In the house I have a flannel shirt that I put on as needed.

PS: radiant floor heat is wonderful, allowing for a much more comfortable house !