The best waterproof warm gloves use a three-part system. An outer shell provides abrasion resistance, a waterproof/breathable membrane blocks water while letting sweat out, and insulation preserves warmth. For dependable performance, look for synthetic insulation, which stays warm even if it gets damp. The construction is also key; a pre-curved shape and a grippy palm give you the dexterity needed for handling walking poles, ice axes, or ropes.
For general hiking, a pair of waterproof insulated gloves is the perfect all-rounder. However, for severe weather, consider winter waterproof gloves that offer more substantial insulation to protect you on the coldest days.