I commute by bicycle 36km roundtrip to work most days, year round. Being in New England, some specialized gear is called for in the winter months. With a good layering system, carbide spiked ice tires, and a sanguine attitude, the hour or so it takes me each way is almost reasonable. It is nice to get some fresh air, have time to think, and it is my only form of exercise.
One key element to the winter ensemble is overmitts. For the past 10 years or so I've been using some gore-tex ones Becky bought long ago for bike commuting. Overmitts are great, because you can put them over light gloves when it is not that cold, or over heavy mitts when conditions are frigid. They typically have a long gauntlet section that can lap up over the jacket sleeve to keep wind out. These ones were roomy enough that in very cold weather I could work my thumbs up out of the thumb holes and keep them in the same compartments as my other fingers to keep them warm, while riding. All in all, very satisfactory.
Unfortunately as the weather got colder late this fall, I could not find the overmitts anywhere. Arrgh! Being at the end of the third year last fall of the No Buying Clothes challenge, this was a serious problem since I didn't just want to purchase a new set from Amazon like a normal person.