The weather dropped down into single digits and I stopped riding when it went below freezing as there is seepage from hills which means ice in the bike commute lanes.
The day before the temps dipped, I rode and am here to report that if you don’t pay attention to the angle you place your thumb on a thumb shifter you split it open from the cold and pressure.
I think 2024 is the year I work on bike posture, one joint at a time. 