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 start of August in Denver marks an average high-temperature of a still warm 83.1°F (28.4°C), hardly distinguishable from the conditions in July. In Denver, during August, the rain falls for 15.1 days and regularly aggregates up to 1.1" (28mm) of precipitation.
• Colorado Springs - August »
  The months with the most sunshine in Colorado Springs are June and August, with an average of 11.7h of sunshine. The months with the highest UV index in Colorado Springs are June through August, with an average maximum UV index of 5.
• Aurora - August »
  In Aurora, during August, the rain falls for 11.4 days and regularly aggregates up to 0.94" (24mm) of precipitation. On the first day of August in Aurora, sunrise is at 5:58 am and sunset at 8:12 pm.
• Fort Collins - August »
  June, August and September, with an average relative humidity of 45%, are the least humid months in Fort Collins. 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%. June, August and September, with an average relative humidity of 45%, are the least humid months in Boulder.
• Pueblo - August »
  In Pueblo during August, the rain falls for 11.3 days and regularly aggregates up to 1.22" (31mm) of precipitation. On the first day of August in Pueblo sunrise is at 6:00 am and sunset at 8:08 pm.
• Greeley - August »
  August and September, with an average relative humidity of 44%, are the least humid months in Greeley. In Greeley during August, the rain falls for 8.5 days and regularly aggregates up to 0.59" (15mm) of precipitation.
• 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. With an average relative humidity of 42%, August is the least humid month in Longmont.
• Grand Junction - August »
  In Grand Junction during August, the rain falls for 8.7 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Grand Junction in August, during 8.7 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.
• 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. On the first day of August in Castle Rock sunrise is at 5:59 am and sunset at 8:12 pm.
• Commerce City - August »
  The least humid month in Commerce City is August, with an average relative humidity of 39%. Commerce City registers an average high-temperature of a still hot 87.1°F (30.6°C) at the commencement of August, closely related to the preceding month.