I broke my cold record Saturday. I went out and did hill repeats with the temp 14 deg F. Layered with a thin base layer under a thicker base layer and a jacket. I had my bib shorts and leg warmers under my unpadded PI thermo bibs. Actually sweated on the way up, but still froze on the way down. I rode again on Sunday when it was about 36 and it felt great with that same layering system.
Glad I did get out both days, because I had to get stitches in my back yesterday, and can't ride or exercise again until they are out.