DENVER — Denver broke a record daily high set 70 years ago on Monday, and forecasters with the National Weather Service in Boulder said temperatures could still get warmer before the day’s over.
Weather service officials said in a social media post the Mile High City had officially broken its daily record high for Dec. 22 with a temperature of 76º F at Denver International Airport (the previous record was 70º F in 1955), and warned “we could add a few more degrees to today's high” before sundown.
Monday’s record high is the second warmest December temperature for Denver since record-keeping began in 1872, they noted, with Dec. 5, 1939, being the warmest December temperature ever recorded in Denver at 79º F.
High temperature so far today in Denver is 76F (old record 70F). This is the second warmest Dec temperature on record for Denver. Warmest Dec temperature is 79F set on Dec 5th, 1939. With temps of 73-79F in the Denver area, we could add a few more degrees to today's high. #cowx pic.twitter.com/jOwZdTAxhG
— NWS Boulder (@NWSBoulder) December 22, 2025
A red flag warning remains in effect for the Front Range foothills, the Palmer Divide and South Park until 5 p.m. Monday due to westerly winds that could gust up to 35 mph combined with low relative humidity — conditions that will be favorable for rapid fire spread.
The fire danger eases slightly on Tuesday as winds relax, but the warm and dry pattern continues, according to Denver7's Clara Faith.
Temperatures will remain well above normal, with highs again reaching the upper 60s for the Denver metro area through at least Christmas Day, which could see a high of 69º F.
