Depends how sensitive you are to the cold. I don't mean this is a bad way but when I tried it on, it fit like a Canada Goose in the sense that it was bulky and cropped. So by that logic it should be more than enough
Arc'teryx and Veilance Thread - Page 5
What you consider cold or warm is relative to how tolerant you are to your environment, B.M.I, layers worn, how far and quickly you walk on your daily commute etc.
The node has 100gsm core loft, not as warm as their field jacket, but still warm. It should be good enough to tolerate single digit temperatures with a light cardigan/sweater underneath, or even a thin Heat Tech shirt from Uniqlo.
Honestly, I don't see the point in the Node Down jacket when the Field IS cost less and is more efficient, unless it's a matter of aesthetics. The only reason for the higher price on the Node is the use of goose down.
I can't answer your question, but have you considered getting a separate shell and mid layer? I just picked up an Atom LT from the regular Arc'teryx line and my Align jacket fits over it perfectly. They have a bunch of mid layer options, including some very warm down ones.
I am also a really big fan of Westcomb. It is another Canadian brand, but all of their stuff is actually made there. I have the Expedition Parka which is Polartec NeoShell with Coreloft insulation and absolutely love it. Neoshell really is awesome stuff and is comfortable enough to keep on inside which is something I never really do with Gore-tex Pro. Even with the new membrane which breathes "up to 28% better or whatevs".