I remember my Grandad telling me about a day in Montana when he was growing up when a chinook blew in leading to a 100 degree swing. I’m not sure how accurate the memory was at 70+ years, (or mine is at 20+ years), but it was a good story.
http://formontana.net/chinook.html
...During the night of January 14-15, 1972 an official weather observer in Loma (50 miles NE of Great Falls) recorded a 103 degree change within 24 hours!...
I am pretty sure he remembered accurately; 60 and 80 degree temperature swings are real common here where I live.
Mostly in September and October, but sometimes in March and April.
Haven’t had a 100 degree swing yet, but I am just waiting for it to happen.
I am somewhat further south than Montana, but I am sure it could happen.
Can be big temp swings here in Montana. Snow one day ... all gone the next. Makes for interesting run-off situations when the ground is still frozen.