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If its below 20F outside, the colder it is the louder the engine but quiets down when warmed up. This seems even louder at first because the car starts on high idle(1500RPM), but even when it idles down a minute or two later its still a bit louder than normal.

Was 55F here today, was quiet as can be when I started it.

 

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Sure Wisconsin has colder temps than West Virgina, so why am I not getting piston slap?

I mentioned this before, but I suspect its because you car is parked in a garage. Even when well below zero outside a garage starting coolant temp are above freezing still. If you have the torque app, next winter when its below freezing start your car and make note of the starting coolant temp, suspect it will be 35-40F+. When parked outside starting coolant temps are typically only a few degrees above outside temps.

Seen one interview with a GM engineer that claimed a huge MPG boost in winter even parking in an unheated garage, since the engine starting temps were always significantly warmer than a car parked outside. Ever notice your wheel well accumulated snow falls off on its own in your garage? That's a good indicator how warm it actually is.... were I park any snow I leave in the wheel wells turns to ice overnight and is almost impossible to remove. My car which sits outside 100% of the time only has startup noise when below 20F, and is much worse when below zero F.