Denver’s temperature drop: from 93 degrees on Monday to 32 degrees on Tuesday -- a tie with September 8, 1962.
The National Weather Service has recorded six other days since 1872 where the temperature dropped by 60 degrees or more in Denver, but they were all during the winter.
The latest plunge came after the city hit a record high of 101 degrees on Saturday, one of its hottest days ever in September.
The current record low is 31 degrees on September 8, 1962.
The record low for September 9 in Denver is 35 degrees from 1898 – another record that could be broken Wednesday.
Far from the ocean and its moderating effect on weather, Colorado is no stranger to extreme shifts.
The weather was gradually expected to warm up, with temperatures back up in the 80s by the weekend in the Denver area.