Exactly why I packed that winter kit for my truck with extra "just-in-case" gear for road-trips. It goes in the truck and stays in the truck. Normally I'd be wearing clothing suitable for the ambient conditions so the gear in that duffel bag are extra, but with it temperature extremes are doable.

There's an REI Elements parka I bought years ago that is simply too warm for SOCAL. Coldest day here I wear a fleece jacket over a fleece hoodie and call it good. So the parka ended up in my truck's winter kit, along with an axe, stove, gloves, merino wool u/w, sweater, gloves, hat, socks, gloves ... et al. Extras and stuff I have no use for in SOCAL.