I do agree, I am not that far up north but have more than a few times left some girls brave some 30- 35 deg weather for a few nights, as long as the day temps were rebounding up into the 50-60,s during the days.The end result was darker purples,oranges and reds.
At this point there is not much of a alternative unfortunately outside of pulling them too early.If it's just a couple days of it she will probably be stronger for it, girls tend to push more thc and temps during low temps as long as were not talking hard freezes for more than 2 days straight.
I wish u the best of luck and fortune and I hope to see some pics of her if all goes well .bye my friend, sincerely, Kyfarmerb1984