.....anything completely waterproof will be a little sweaty at that price and at any price really.
I've got some Specialized sub-zero gloves that are very warm and waterproof but your hands sweat like hell in them even at 2 degrees C.
I've also got some sealskinz windproof gloves (£20) which are pretty good but also get sweaty if it's not really cold. They also seem to be pretty waterproof even though they don't claim to be!