The Extremeties: Keep Your Hands Warm!

Now let's just get down to business;  There are only a few materials that will actually keep you warm or benefit you while you're out in the cold and wet of winter:

1.  Thinsulate
2.  Neoprene (foam)
3.  Leather (but only as a shield)
4.  Titanium (the best)
5.  Polyester
6.  Any waterproofing material (a good shield, but breathability is a must through time)
7.  Polar fleece (excellent material)

Here are some examples of some good types of items to wear for snow removal.  You'll likely want something waterproof, breathable, and warm.

Wetsuit or Diving Gear/Materials:

Sure, it seems strange, right?  But it's not.  Divers wear these materials for the exact same reasons that you should - severe cold, wet or standing water conditions.  And it all comes down to neoprene.  Specifically it's neoprene foam, but it's just referred to as neoprene.  This neoprene alone will keep you waterproof and warm - however, if you really want to be toasty, there are special diving gloves made with flaked titanium (Ti) metal within the neoprene.  Now titanium is something else.  It not only keeps in the warmth, but it keeps in the right amount of warmth too.  It's always moderate.  And better yet, it NEVER gets cold!  Now how's that for winter gear, eh?

They also have basic neoprene foam gloves now simply called neoprene gloves.  You can find them most places today, particularly online of course.  Here's a great overall cold weather work glove that uses neoprene for warmth:  http://amzn.to/1WLrshl

Thinsulate:

I refer to Thinsulate as "super polyester".  It is very much like polyester, only composed of finer and denser fibers.  This makes the insulation value go up immensely and allows gloves of typical size to be made with the insulation qualities of a full layer of polyester - which would otherwise make the gloves out to be monstrous mittens.

Polyester:

Good material and what can now be called the "standard" insulation used on winter coats, boots and gloves, traps heat quite well, but will build up moisture through time. An excellent material,  but not the best.  However, it does a good job and is very inexpensive compared to other materials.

Leather:

Naturally leather, pigskin and deerskin gloves will do quite well (with a water repellant coating and anyway, they're better as a jacket against the wind really).  But make sure you wear a nice liner or other material with the gloves.  Now is a fine time to mention wool or even sheepskin I suppose, but hey, only as a liner!  By themselves they'll not do quite as well, particularly in flowing water, which is really your situation in snow removal.  And even if you're in a plow truck, what happens when something gets stuck and you have to climb out to dislodge it or work on the plow or a part of the truck?  Right, you're right in the middle of a mass of snow or likely a blizzard type condition.  Either way, a lot of snow and that means water.  But hey, sheepskin and wool do make some of the best liners for gloves, particularly when you're only going to be working for a limited time.  If you have to work all day long or for an extended period, try polar fleece instead.

Polar Fleece:

Hey, what can I say, right?  Polar fleece is the BEST!  But it doesn't give you the waterproofing or resistance that you need for the long haul.  Once again, this is best as a liner or inner layer, but when you use it, you will NEVER be cold again, regardless of the conditions.  This material is just unbelievable in that regard when you get out there and work with it.  It's not the easiest thing to find either, but if it comes down to it, the material is so effective that you can just buy panels of the material and insert it within gloves, coats, hats, boots, pants, etc as "reflectors" for heat retention.  An excellent material for sure!

Waterproofing:

Naturally ANY of the well known waterproofing materials will due well.  For instance Gore-Tex being a prime example.  These sorts of materials are perfect for lining gloves, boots, hats, jackets, leggings, etc.  The main advantage to these materials over most other forms of waterproofing is that they are breathable.  But naturally these days, Gore-Tex and other copycats have become a near standard for making items waterproof.  A key example of the wind, water and cold shielding power of Gore-Tex can be witnessed in the military ECWCS or ECWS clothing that are hardly more than an outer liner of nylon and thick heavy Gore-Tex to keep one exceptionally warm and dry in even arctic conditions!

PowerGrab Thermo, a perfect overall winter work glove

And naturally you're going to do well while working by choosing a winter work glove or a military or equipment operator cold weather glove.  Any of these will be ideal for the conditions faced during snow removal.  And that even includes a glove designed for winter motorcycle or ATV operation of course.  Most of these gloves will have a gripping palm such as even the highly effective latex or PVC dots or gripping area layer - which will increase your gripping strength under wet conditions tremendously.  You can find a great and cheap version of the above here:
http://amzn.to/1Mdjru4 

You can also find a slightly more effective form of glove here:
http://amzn.to/1JQvcEZ
And the deluxe version of the superior gripping power rubberized palm winter work glove can be found here:http://amzn.to/1Ph9u4g