The only thing is it is winter. She might be too cold by her self. I would keep an eye on her and maybe have a goat blanket handy if temperature take a dip.
you could conceivably get a ND kid from a summer breeding. But, unless it is from a breeder you know you would want to quarantine. And by then she would kid.
I wouldn't worry too much about the temperature, just the fact that it is a herd animal and would be lonely.
All things considered, I would just wait until she kids, I think she would be fine.