The city's 6-degree high on Wednesday shattered a 98-year-old record for the coldest high on this date. And, according to a National Weather Service tweet late in the evening, the temperature had fallen to -5 degrees at Denver International Airport — a record low for the date.
The previous record low of -4 was even older, set more than 130 years ago in 1882.
Also Wednesday night, the weather service issued a wind chill advisory for much of the state — including Denver and the Front Range. The advisory is in effect until 9 a.m. Thursday.
Wind chill values are expected to be as low as minus-25 degrees overnight, with 10 mph winds.
The low temperature overnight is expected to be in the negative teens.