Yeah, Spearfish has the most rapid temperature change ever recorded. In just two minutes it went from -4° to 45°. Loma, Montana has an incredible record as well, where it went from -54° to 49° in 24 hours. That's a 103° change! Can't forget Browning, Montana where it dropped from 44° to -56° in a day. Montana also holds the record for coldest temperature in the lower 48, which is -70° at Rogers Pass.