# Extreme heat trends in Colorado

> Live situation record from CLSTR: https://clstr.news/situations/extreme-heat-trends-in-colorado
> Updated: 2026-09-03T23:10:04.000Z. Sources: 4. Developments: 2.

Colorado has experienced extreme heat events, including a four-day period in late July that climatologists identified as the worst heat wave in 75 years of recorded data. During this period, the statewide average temperature reached 78.75 degrees Fahrenheit on July 27, surpassing the previous record from 2005. In Boulder, the summer of 2026 saw 23 days at or above 95 degrees, with temperatures at the municipal airport tying the all-time high of 104 degrees.

Subsequent climate data indicates a broader trend of rising temperatures. In Colorado, September 2024 is noted as being among the hottest Septembers since 1895. These regional temperature increases align with long-term data from the National Oceanic and Atmospheric Administration showing a global temperature increase of approximately 2 degrees Fahrenheit since 1880.

## Timeline

### 2026-09-03: Climate data shows rising September temperatures in Colorado and Texas

Climate change continues to drive rising temperatures in the U.S., with historical data showing record-breaking heat in states like Colorado and Texas during the month of September.

4 sources. https://clstr.news/cluster/climate-data-shows-rising-september-temperatures-in-colorado-and-texas

### 2026-08-13: Colorado experiences record-breaking heat waves

Colorado is facing record-breaking heat waves, with Boulder setting new annual temperature records and state climatologists linking the extreme weather to human-caused climate change.

7 sources. https://clstr.news/cluster/colorado-experiences-record-breaking-heat-waves

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Cite as: Extreme heat trends in Colorado. CLSTR, https://clstr.news/situations/extreme-heat-trends-in-colorado