I live in Colorado Springs, CO.....and I ride all year 'round, 'cause I no longer own a cage.
I've been using Hippo Hands knockoffs for years:
In fact, I just installed 'em for the cold season today, as it was in the high 30's with a nasty wind.....overcast, too. In addition, I wear winter gloves with decent-sized gauntlets. On really cold days, I wrap my hands around the barrel when waiting at stoplights. That works well and feels good.
I use a wind resistant jacket (an old Nomex flight jacket) with layered sweatshirts underneath. I wear long johns under my jeans.
I wrap a long scarf around my neck and also have a helmet skirt (SWMBO makes 'em for us):
If it gets really cold, that's when I put my Sorels on:
I grew up in Minnesota.....everyone has snowmobile boots up there. I've had my Sorels for almost 40 years and they still rock....no problems shifting or anything!
This all works well for me until the temperatures drop into the single digits. I've ridden long distances with temps that low, but I had to resort to my electric vest, electric gloves, down parka, and ski pants. That was on other bikes, as my Savage is not wired for electrically heated clothing.
No, if it is 8 degrees F and I need to ride my Savage, I just accept the fact that I'm going to get cold. The Hippo Hands and the snowmobile boots minimize any chances of frostbite (BTDT!).