August weather forecast
Colorado, USA

August continues the summer heat in Colorado but begins to hint at a gradual cooling as the state transitions towards autumn. In the Eastern Plains and cities like Denver, temperatures generally range from 58°F (14.4°C) to 88°F (31.1°C), remaining warm but often slightly cooler than the peak temperatures of July.

This month, Colorado's weather still accommodates outdoor activities, and recreational areas remain bustling with visitors. In the mountains, temperatures are milder, and the weather is more temperate, attracting hikers and nature enthusiasts.

Thunderstorms persist, primarily in the afternoons, continuing the pattern established earlier in the summer. While these storms can be intense, they are usually short-lived and localized, contributing to the overall precipitation levels in various parts of the state.

Towards the end of August, the first signs of autumn may become evident, particularly in the higher elevations, where cooler nights begin to set in, and vegetation starts to show subtle changes in color.

August in Colorado retains the essence of summer but introduces a gradual shift towards the cooler and more varied weather of the approaching fall season. The balance of warm days, cooler nights, and occasional thunderstorms create a dynamic and engaging climate, reflecting the transitional nature of this month within Colorado's diverse weather landscape.

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• Denver - August »
  Thus, Denver's August weather is characterized by warm days, clear skies, and comfortable summer nights, the perfect setting for late summer get-togethers. 
 The shift from July to August in Denver is characterized by an average high-temperature of a still warm 83.1°F (28.4°C), not significantly different from the 84.4°F (29.1°C) of July. The months with the most sunshine in Denver are June through August, with an average of 11.8h of sunshine.
• Colorado Springs - August »
  June and August, with an average of 11.7h of sunshine, are months with the most sunshine in Colorado Springs. The months with the most sunshine in Colorado Springs are June and August, with an average of 11.7h of sunshine.
• Aurora - August »
  In Aurora during August, the rain falls for 11.4 days and regularly aggregates up to 0.94" (24mm) of precipitation. August is the least humid month in Aurora, with an average relative humidity of 42%.
• Fort Collins - August »
  The months with the lowest humidity in Fort Collins are June, August and September, with an average relative humidity of 45%. The months with the lowest humidity in Fort Collins are June, August and September, with an average relative humidity of 45%.
• Boulder - August »
  The months with the lowest humidity in Boulder are June, August and September, with an average relative humidity of 45%. On the last day of August, in Boulder, Colorado, sunrise is at 6:28 am and sunset at 7:33 pm MDT.
• Pueblo - August »
  In Pueblo, Colorado, in August, it is raining for 11.3 days, with typically 1.22" (31mm) of accumulated precipitation. In Pueblo, in August, during 11.3 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.
• Greeley - August »
  August and September, with an average relative humidity of 44%, are the least humid months in Greeley, Colorado. June through August, with an average maximum UV index of 6, are months with the highest UV index in Greeley, Colorado.
• Longmont - August »
  August presents another month of the summer season in Longmont with the temperature slightly decreasing compared to July, yet still maintaining a strong hold on the warmth. In Longmont during August, the rain falls for 13.3 days and regularly aggregates up to 0.98" (25mm) of precipitation.
• Grand Junction - August »
  On the last day of August, in Grand Junction sunrise is at 6:42 am and sunset at 7:45 pm MDT. The months with the highest UV index in Grand Junction are June through August, with an average maximum UV index of 6.
• Broomfield - August »
  June through August, with an average of 11.8h of sunshine, are months with the most sunshine in Broomfield, Colorado. The months with the highest UV index in Broomfield are July and August, with an average maximum UV index of 6.
• Castle Rock - August »
  The month of August provides a respite from the intense heat of July with slightly lower temperatures in Castle Rock. In Castle Rock, Colorado, during August, the rain falls for 13.3 days and regularly aggregates up to 1.14" (29mm) of precipitation.
• Commerce City - August »
  On the first day of August in Commerce City, Colorado, sunrise is at 5:59 am and sunset at 8:12 pm. August is the least humid month in Commerce City, with an average relative humidity of 39%.