Summer temperatures · Colorado
How hot does Denver get in summer?
In a typical summer, June to August, Denver averages highs around 87°F and lows around 57°F.
About 46 days a year reach 90°F or hotter, and about 2 reach 100°F. About 107 days a year get to 80°F or warmer. That makes it the 52nd coolest summer of the 129 US cities we track.
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The hottest high in the forecast for the next 48 hours is about 60°F.
Denver reaches 90°F on about 46 days a year, but a mile up the nights fall to about 57°F, so even the hottest day hands back a cool evening.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 87°F |
|---|---|
| Average summer low | 57°F |
| Days a year at 80°F or warmer | 107 |
| Days a year at 90°F or hotter | 46 |
| Days a year at 100°F or hotter | 2 |
| Average winter high, for comparison | 45°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Fort Wayne, Indiana: highs around 82°F, lows around 62°F
- Sioux Falls, South Dakota: highs around 83°F, lows around 61°F
- Detroit, Michigan: highs around 82°F, lows around 63°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00003017.