Midweight insulation (100–200g) is the sweet spot for the majority of resort skiers and all-mountain riders. It provides enough warmth for typical winter conditions—think single-digit to mid-20s Fahrenheit—without making your hands feel like they're wrapped in pillows. You'll still have the dexterity to adjust bindings, zip jackets, and grip poles comfortably.
Going heavier "just in case" is a common mistake. Over-insulated gloves can cause your hands to sweat during active riding, and that moisture actually makes you colder once you're sitting still on a long lift ride. Midweight strikes the best balance between warmth and breathability for everyday conditions.
If you run exceptionally cold or frequently ski in bitter, sub-zero conditions, heavyweight may be worth it. But for most skiers riding typical winter days, midweight is the most versatile and comfortable option. You can always add a thin liner glove underneath on the coldest days for a quick boost.