I almost always sweat even when it's really cold. However, I sweat less if I dress so that I'm chilly during the first 5-10 minutes of riding. It also helps to wear a jacket that ventilates well. My Showers Pass Elite rain jacket is my primary winter jacket, even when there is no rain in the forecast, because it is so breathable and ventilated. I usually wear a single, long-sleeve base layer under the jacket -- with varying thicknesses depending on the temperatures. On typical winter days with temperatures ranging from mid-20s to the 50s, I wear a Craft active base layer. On colder days with morning temps in the teens to low-20s, I wear an Under Armor fleece base layer and sometimes a jersey as well. On days with temps ranging from the 40s to 60s, I wear a thin poly wicking base layer.

All of my winter jackets have pit zips that increase ventilation, and I always keep them open, even on the coldest days. I usually open the zippers at necks of jackets after I've warmed up while riding. My Showers Pass jackets also have cuffs that can be opened wider to allow ventilation on my arms. In addition to the SP Elite jacket, I have a SP Skyline jacket that has excellent ventilation altho not quite as much as the Elite. I also have a Gore Phantom jacket that has decent ventilation altho not as much as either SP jacket.