-4 is a fresh autumn morning just crisp enough to put a spring in your step and keep you moving until the sun hits your back around 10am.
-34 the snot freezes hard to your top lip but don't dare greet about it as the tears will only freeze to your cheek bones. I don't even have to tell you about the steel sticking to your hands or worse, not sticking to your hands and slips through your fingers at the worst possible moment.
I've had it cold, not sure exactly to what degree, certainly nowhere near -34 but give me it too hot than cold any day of the week.