Staying dry is just as important as dressing warm.
When cleaning windows in cold wet weather, wearing gloves and a sacrificial outer layer will do much to keep you comfortable. That will keep your core from getting wet.
I've found that putting on a few thin layers and 1 thick layer when it gets really cold is quite effective. Thermal long-sleeve t-shirt, turtleneck, sweatshirt are all easy to move around in and get me through a winter of cleaning windows.
I would add that your first layer should be a undershirt and or thermal underwear that are wicking material. That will ensure you keep dry and reduce the chill factor.
I would add that your first layer should be a undershirt and or thermal underwear that are wicking material. That will ensure you keep dry and reduce the chill factor.
That's what I did today. Thermal undershirt, turtleneck and sweatshirt. Early on when it was in the teens I added a medium weight jacket. When it got into the low-mid 20's the coat wasn't necessary. Dry hands and I was fine, even with a wind that let me know it was there.