Back in the day I used to practice outside in the winter. I tried to practice with my guns as I would normally carry them. Not extended sessions, but usually with whatever loadout for that particular weapon. I wanted to check my abilities when my hands were cold or I was cold. Under those conditions running an airweight 38 snubby could be a challenge. Reloading with loose rounds with frozen hands was much slower. Speedloaders were a great help. Recoil was felt more. I also found I was more likely to fumble with reloads, dropping ammo in the snow on occasion. Because of that, I tended to carry more ammo in the winter time. I still do to this day. It is the first reason I offer to those that "script" their self defense shootings, saying "you don't need more than X amount of shots." I don't carry extra ammo generally because I expect to shoot a lot. I carry it for malfunctions and for the times under stress where I may drop ammo in the snow, or at a dead run.
I also discovered that it was a lot easier to shoot a semi auto with cold hands. Especially the Glock. Easier to reload and to keep running at speed. They were less cold to the touch than the aluminum frame guns. I also favor the NY1 trigger for its feel and heavier pull. I shoot it as well as a standard trigger. I feel I have more of a margin of safety with the heavier pull with cold and numb hands. My snubs are 95% of the time used as back up guns, if and when needed as such. In the winter they usually are in an outer coat pocket.
I was and am fortunate that I have a place to shoot outside year round. Shooting under all weather conditions can give one a better insight as to what works and doesn't work. If you live or operate in places where it can get brutally cold, I highly suggest you practice under those conditions. Even if you can only do it a few times.
Just my observations, FWIW.