Quick Fact
August is typically the hottest month in Denver, Colorado, with an average temperature hovering near 80°F (26.7°C). The record for the hottest August was set in 2011, with a monthly average of 77.0°F (25°C).
Geographic Context
You'll find Denver, Colorado, on the western edge of the Great Plains, right up against the Rocky Mountains' Front Range at 39.7392° N, 104.9903° W. Honestly, that "Mile High City" nickname is no joke—it's exactly one mile above sea level. That high-desert, semi-arid spot means you get crazy intense sunshine and some serious temperature swings from day to night, especially in summer. August is basically summer's last big push of heat before the cool mountain air of autumn shows up.
Key Details
| Metric | August Average | Range |
|---|---|---|
| Daily High Temperature | 86°F (30°C) | 84°F to 88°F (28.9°C to 31.1°C) |
| Daily Low Temperature | 60°F (15.6°C) | 58°F to 62°F (14.4°C to 16.7°C) |
| Days at or above 90°F (32.2°C) | Frequent | Varies annually |
| Record Hot August (2011) | 77.0°F (25°C) Avg. | Monthly average of highs & lows |
Interesting Background
Denver's weather is full of surprises. It's shaped by those famous chinook winds and, of course, the altitude. Now, August might be the warmest month on paper, but it's also when the monsoon season starts to wind down. That means you can still get these sudden, dramatic afternoon thunderstorms that just wipe out the heat for a little while. The record heat from August 2011 wasn't just a local thing—it was part of a bigger pattern of extreme weather across the country that year, according to NASA data. If you look back, the city's whole growth on the plains (thanks to mining and agriculture) was totally tied to figuring out how to work with this specific, challenging climate.
Practical Information
Thinking about visiting? August gives you reliably warm, sunny days that are perfect for city parks or a trip into the Rockies. Here's the thing: it's also the busiest time for tourists. For slightly cooler weather and smaller crowds, try the shoulder seasons in May-June or September-October instead. Getting around? Denver's RTD public transit system has a lot of bus and light rail lines, but the city is really spread out. If you want to go beyond downtown—say, to Red Rocks or a mountain town—you'll probably want a rental car. That said, the fare-free 16th Street MallRide and Free MetroRide buses are super handy for getting around the core areas during busy times.
