Layers, layers! I really like the UA Cold Gear also; they make ‘long johns’ I highly recommend. You are spot on with a winter hat, keep the noggin warm keeps body warm; as others have posted, keep feet & hands warm makes huge difference. Sweater can be problematic in wind without a shell.
35F this morning’s round. I was able to peel off light layers as day warmed up to remain comfy.
Hope this helps!