Considering handlebar covers/mittens for doing #OpenStreetMap updates in cold weather. They're quite pricey though. Would they help?
It's fairly slow travel, with frequent stops near the footway=sidewalk to record data on the phone. Are they any good for that sort of thing, if I use them with a pair of insulated fingerless gloves underneath? #BikeTooter@bikes@mastobikes@cycling
I've had good experience with http://barbra.ca/ - protects from wind/cold/snow, but easy to take hands out and back in. I assume you do have good insulation grips on handlebars too? Also, depending on what/how you map (and how vehemently against postprocessing you are), audio mapping & handsfreeset might be an alternative to stopping and typing.