As part of our winter half-marathon training program, we went out this morning and did 7 miles (a taper week) but at 9F. Luckily there was no wind.
I wore The Marmot over my usual layer of Icebreaker wool base layer, and a thicker head band. Still the last mile I started to get cold, and having to stop a couple times for traffic lights, by the time I got back to the running store, my sweaty clothes were freezing and I was quite chilled.
I've been home for about an hour now, and I'm still cold (i.e. give me a break if Ode To Turning Fifty is not necessarily PSA Award materiel).
I heard/read a Norwegian's saying that you can't have bad weather, but you can have bad clothing.
You can still have bad weather if it's over 90, or over 80 and very humid.