I hear you!!! I am usually good down to low 30's high 20's if I am ambitious enough. As soon as low to mid 20' arrive, I start thinking about Irish Cream and Coffee cause my dang hands can't handle the cold like they used too.
Mom drew my name for Christmas, bib overalls is on the list!! Carhartt or Berne? Or others...?
I always go with carhartt.
As for your hands, here's something I learned by accident, by first hand experience, (no pun intended), when I was 18.
I was working in Washington state, as a volunteer, helping to move a fishing village. Cold COLD... and WET. I have always had poor circulation, so my hands and feet get cold quickly, anyway. Add the cold and wet, and I was miserable. Could hardly hold a hammer.
Looking for something free to maybe make the day a bit better, I found some peppermint plants outside the kitchen door. Pulled a few 'branches', and laid them on some newspaper on top of the fridge for a couple days. So they weren't quite dried out. Made some tea out of the leaves, and put it in a thermos to take to work.
Discovered that if I drank a bunch of that in the morning, and then drank it during the day instead of coffee, my hands and feet stayed surprisingly much warmer.