Will I be cold?
Will I be cold in Denver in August?
Verdict
No — No, comfortable.
Lows stay near 57°F — you won't be reaching for the puffer.
Day vs. night
Day
85°F
Hot
Prioritize shade, hydration, and a brim.
Night
57°F
Cool
You'll want a warm layer after sunset — not a heavy coat.
Why
Denver in August averages highs of 85°F, lows of 57°F, 9 rainy days.
You can pack for the daytime temps and not worry about the evening dip.
The day-to-night temperature swing is 28°F, which is the real story here — the average number hides how different midday and midnight feel.