Wednesday is expected to be the hottest day of 2026 so far, with temperatures hitting triple digits in southeastern Colorado and the upper 90s in Denver, according to the National Weather Service.
Denver temperatures are expected to climb into the 90s by 1 p.m. Wednesday and peak at 96 degrees near 5 p.m., according to . The current is 100 degrees, set in 2021.
In southeastern Colorado, weather service forecasts include:
- 101 degrees in , which would break the city’s 98-degree heat for June 17, set in 2021
- 103 degrees in , which would tie the city’s for hottest June 17, set in 2021
- 103 degrees in , falling just short of the city’s 104-degree , set in 1939
- 105 degrees in , which would break the city’s for June 17, set in 2021
Triple-digit temperatures will also affect a limited area on Colorado’s Western Slope, including Grand Junction, according to the weather service. Temperatures are expected to hit 101 degrees by 4 p.m. in , just short of the set in 2021, according to the weather service.
A will be in effect on Wednesday from 11 a.m. to 7 p.m. for parts of El Paso, Fremont and Pueblo counties in southern Colorado, according to the weather service. Temperatures between 97 and 105 degrees are expected and may cause heat-related illnesses, forecasters said in the advisory.
“Take extra precautions when outside,” forecasters wrote. “Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.”
will also be active for most of western Colorado from noon to 8 p.m. on Wednesday, according to the weather service. The warnings include parts of Boulder, Chaffee, Clear Creek, Fremont, Gilpin, Grand, Huerfano, Jackson, Lake, Larimer, Las Animas, Mesa, Park, Pueblo, Summit and Teller counties.
Wind gusts up to 50 mph and humidity as low as 10% are expected, forecasters said.
“Conditions will be favorable for rapid fire spread,” weather service forecasters wrote in the alerts. “Avoid outdoor burning and any activity that may produce a spark and start a wildfire.”
This is a developing story and may be updated.
