I never go winter hiking without an extra pair of warm gloves. It's just too easy to lose a glove and that could be very bad news on a cold day. Plus, I hate cold hands, so I'm likely to start with gloves even temps in the 50s if my hands feel cold.
I have an assortment of gloves and I usually carry a range of at least three of these. From light to heavy:
a) a super thin stretchy glove, the kind that are sold for use with iphones. Not much warmth, but just enough on a cool day. Or as a liner for heavier gloves.
b) Power stretch fleece gloves. Light stretchy fleece with a smooth fabric exterior. Love these. Great for driving. Great for hiking. Even great for sleeping in a cold tent. Worn by themselves or as a heavy liner.
c) DriClime gloves. Like Marmot windshirts. Wind resistant DWR glove with a very light lining. Good for warm windy days.
d) Fleece lined softshell gloves. Basically, stretchy fleece with a stretchy softshell outer. These are my standard hiking gloves on a windy cool day as they block some wind. Good for rock scrambling.
e) Marmot Precip waterproof overglove. No lining. No warmth. Just waterproof. For use over any of the above. These are almost always in my pack, just like a rain jacket and rain pants. In addition to being waterproof, they serve as an additional emergency layer in the same way as rain pants.
f) GoreTex winter gloves with synthetic insulation. These would be my standard hiking gloves on cold winter day.
g) GoreTex winter mitts with synthetic insulation. Same thing as above, but even warmer. Mitts are a pain in the butt, but they are warm. Really cold windy day. Can wear any of the thin gloves as a liner for even more warmth.