The limit for PZeros is 45F, but I have on occasion driven mine at, or even below, that temp, but only because I had to.
Really though, there isn't much arm twisting going on, the tires are so damn hard that the car tells me about as soon as I get stupid.
"Hey, I'm really not up for this cold weather shit, please put me back in my bed, if you don't, I'm going to show you the Colorado ditches."