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Colorado weather: Triple-digit heat to roast Front Range, Eastern Plains

Record-breaking temperatures expected in Denver area, according to National Weather Service

A map from the National Weather Service shows the area under a heat advisory on Sunday, July 26, 2026. (Provided by the National Weather Service)
A map from the National Weather Service shows the area under a heat advisory on Sunday, July 26, 2026. (Provided by the National Weather Service)
Lauren Penington of Denver Post portrait in Denver on Tuesday, Aug. 6, 2024. (Photo by Hyoung Chang/The Denver Post)
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Another day of record-breaking heat is forecast for Colorado’s Front Range and Eastern Plains as temperatures climb above 100 degrees, including in Denver, according to the National Weather Service.

Temperatures in the city are expected to peak near 103 degrees between 3 p.m. and 4 p.m., . The heat will only drop back below 80 degrees after 2 a.m. Monday, with an overnight low of 72 degrees forecast for Denver, .

“Hottest day of the year,” . “Take it easy and stay well by seeking shade, avoiding strenuous activities, staying hydrated, and checking on those without AC, including pets and livestock. Seek immediate medical aid if you fall ill due to heat.”

A 103-degree high would break Denver’s current July 26 heat record of 100 degrees, set in 1910, . Other highs expected Sunday include:

  • 101 degrees in , which would break the 98-degree set in 1935
  • 104 degrees in , which would break the 101-degree daily heat record set in 2023
  • 99 degrees in , which would break the 97-degree daily heat record set in 1894
  • 89 degrees in , which would tie the daily heat record set in 1948
  • 102 degrees in , which would break the 100-degree daily heat record set in 1910
  • 99 degrees in , which would break the 85-degree heat record set in 2010
  • 106 degrees in , which would break the 102-degree daily heat record set in 2003
  • 105 degrees in , which would tie the daily heat record set in 1894
  • 100 degrees in , which would break the 98-degree daily heat record set in 1982
  • 100 degrees in , which would break the 98-degree heat record set in 2023
  • 102 degrees in , which would break the 100-degree record set in 2007

The weather service’s Boulder office issued a on Sunday, which will be in effect until 9 p.m. The advisory covers Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, Larimer and Weld counties.

Triple-digit heat will also affect valleys in western Colorado, according to the . A separate that covers the Grand Junction area and , as well as parts of eastern Utah, will be in effect until 6 a.m. Tuesday.

This is a developing story and may be updated.

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