Denver Weather in August

While August's weather is similar to the previous month's at Denver, Colorado, extremely hot temperatures are less common now.

This page gives detailed information on the typical August temperature, precipitation, sun, humidity, wind and storms for Denver. The numbers here are historical averages based on climate data gathered in the Denver community of Stapleton.

Temperature Weather iconTemperature

88 °F August average high 31 °C
57 °F August average low 14 °C
13 days 90 °F max. or more (32 °C)
24 days 60 °F min. or less (16 °C)

Nearly every day in August warms to over 80 degrees Fahrenheit (27 degrees Celsius) in Denver. Temperatures above 100 °F (38 °C) occur during August about once in a decade.

At night, the thermometer dips to 50 °F (10 °C) just once or twice this month. But August does not normally get as cold as 40 °F (4 °C).

Rainy Weather iconRain

1.8 in total precipitation 42 mm
8 days of rain

Half the time, Denver receives 0.7 to 2.9 inches (17 to 75 mm) of rainfall in August. One in four years has drier weather, while another one in four is wetter. None of the precipitation falls as snow.

Sunny Weather iconSun

71 % sunshine
10 days clear skies

The sun's rays reach the ground in Denver during 71 percent of daylight hours on average in August, for a total of 301 hours in the month. Typically on 10 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at Denver lasts for 13 hours and 40 minutes a day on average. The longest day of the month is the 1st with 14 hours and 13 minutes of daylight. By the end of the month, the days have shortened to 13:05 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

49 % August average humidity

The relative humidity in Denver during August usually peaks at 69 percent in the morning then drops to 30 percent by early afternoon.

Local Time2 am5 am8 am11 am2 pm5 pm8 pm11 pm
Humidity % 65 69 53 36 30 35 49 58

Windy Weather iconWind

8.1 mph August wind speed average 13.0 kph

August is a little less windy than most other months in Denver.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
9 days with thunderstorms in August

About once every two years, an inch (25 mm) or more of rain drenches Denver in one day during August.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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