How do I keep my hands from sweating in the winter?

Talcum power works wonders. Bring it with you.
How do I keep my hands from sweating in the winter?
Buy a deodorant that's high in aluminum chloride (Certain Dri or Drysol) and apply it to your hands. Aluminum Chloride is the ingredient that blocks sweat pores.
How do I keep my hands from sweating in the winter?
Use a hand warmer. The heat will dry it off.