I bought two of these I liked it so much (blue/black and hi-vis/black): Gore Bike Wear Phantom 2.0, and wore it down to 5 F on my morning commutes this week, with a medium weight long sleeve base layer, and a really thin long sleeve base layer under that, along with Izumi AmFib windproof bib pants and standard padded bib shorts.

This jacket is 100% windproof, water resistant, and its usable temp range is 0 F (with 2 bases) to 60 F (with nothing under), and has removable sleeves (for days that get above 60 F unexpectedly), which unzip, roll up, and store easily in one of the three ample back pockets, and has built in short sleeves. But this is an unexpectedly thin single layer cycling jacket, with a breathable back panel to release hot moisture during a hardcore vigorous ride, and not a fashion jacket that is multi-purposed for cycling. The sleeves are designed to be a little extra long for getting into the drops without the cuff riding up and exposing wrist skin. Highly recommended. $100 on sale. I'm 5'10", 169 lbs, 33 waist, and longer than avg arms, and the Large fits nicely.