Denver’s record-breaking temperatures – what’s the hottest it’s gotten in the Mile High City?

It’s hot in Denver right now, actually so hot that it could go down as some of the hottest days we’ve ever seen.

Some models were projecting as high as 107 degrees for parts of town before shifting the ridge northward and dialing back to a still-scorching 95-100 degree range. If Denver strings together three consecutive 100-degree days, it would tie the fifth-longest such streak in the city’s recorded history — a feat accomplished only twice before, in June 2021 and July 2012.

For context on just how rare triple-digit heat is here: Denver has recorded only 114 days at or above 100 degrees since record keeping began in 1872. That averages out to less than one per year over 154 years. The all-time record is 105 degrees, hit on five separate occasions — Aug. 8, 1878; July 20, 2005; June 25 and 26, 2012; and June 28, 2018. The longest streak of consecutive 100-degree days is five, which has happened three times: July 1989, July 2005 and June 2012. Denver saw six 100-degree days in 2024, the most in a single year since 2012’s blistering 13, and just one in 2025.

This heat wave lands on top of what’s already been the hottest start to a year in Denver’s history. The city posted an all-time record average temperature through May, and back in March, Denver smashed the all-time monthly record when the thermometer hit 85 degrees on March 19, obliterating the previous March record of 84 degrees and a 119-year-old daily record in the same afternoon. The winter that preceded it was the city’s warmest since 1933-34.

The NWS is advising Coloradans to limit outdoor activity to mornings and evenings, wear lightweight clothing and check on elderly neighbors. Overnight lows near 70 degrees — unusually warm for Denver — will limit the natural cool-down the city usually counts on.