August weather forecast
Wyoming, USA

August continues the summer warmth in Wyoming, although the month often serves as a transitional period leading into autumn. Average low temperatures hover between 50°F (10°C) and 60°F (15.6°C), similar to July, but average high temperatures begin to show subtle signs of cooling. In the plains, high temperatures usually stay below the July peak, often reaching up to 85°F (29.4°C). In higher elevations, the climate remains moderate with temperatures typically between 70°F (21.1°C) and 75°F (23.9°C).

When compared to July, August offers slightly shorter days and a small decrease in temperature, indicating the impending arrival of fall. While wind speeds generally lessen, winds can still provide a cooling relief during hot spells. Thunderstorms remain a weather event to watch for, although their frequency starts to diminish as summer winds down. August stands as the last month of peak tourist activity, especially in Wyoming's national parks. Trails remain open, and the state’s diverse flora starts showing early signs of the coming autumn, offering a different yet equally appealing natural spectacle.

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• Cheyenne - August »
  With an average relative humidity of 43%, August is the least humid month in Cheyenne, Wyoming. With an average relative humidity of 43%, August is the least humid month in Cheyenne, Wyoming.
• Casper - August »
  January, August and September are months with the least rain in Casper when the rain falls for 7.5 days and typically aggregates up to 0.43" (11mm) of rain. January, August and September are months with the least rain in Casper when the rain falls for 7.5 days and typically aggregates up to 0.43" (11mm) of rain.
• Laramie - August »
  In Laramie during August, the rain falls for 13.3 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Laramie during August, the rain falls for 13.3 days and regularly aggregates up to 0.98" (25mm) of precipitation.
• Gillette - August »
  The months with the most sunshine in Gillette are July and August, with an average of 11.8h of sunshine. The months with the most sunshine in Gillette are July and August, with an average of 11.8h of sunshine.
• Rock Springs - August »
  July and August, with an average relative humidity of 31%, are the least humid months in Rock Springs, Wyoming. The months with the lowest humidity in Rock Springs, Wyoming, are July and August, with an average relative humidity of 31%.
• Sheridan - August »
  The least humid month in Sheridan, Wyoming, is August, with an average relative humidity of 46%. In Sheridan, in August, during 17.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.
• Green River - August »
  July and August, with an average of 11.8h of sunshine, are months with the most sunshine in Green River. The months with the most sunshine in Green River are July and August, with an average of 11.8h of sunshine.
• Evanston - August »
  The month with the least rainfall in Evanston is August, when the rain falls for 7.3 days and typically collects 0.51" (13mm) of precipitation. In Evanston, Wyoming, during August, the rain falls for 7.3 days and regularly aggregates up to 0.51" (13mm) of precipitation.
• Riverton - August »
  On the first day of August in Riverton, Wyoming, sunrise is at 6:05 am and sunset at 8:34 pm. In Riverton, snow does not fall in June through August.
• Jackson - August »
  In Jackson, Wyoming, during August, the rain falls for 11.8 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Jackson in August, during 0.5 snowfall days, 0.12" (3mm) of snow is typically accumulated.
• Cody - August »
  In Cody, during August, the rain falls for 8.8 days and regularly aggregates up to 0.67" (17mm) of precipitation. In August, in Cody, Wyoming, the rain falls for 8.8 days.
• Rawlins - August »
  On the first day of August in Rawlins, Wyoming, sunrise is at 6:03 am and sunset at 8:26 pm. On the first day of August in Rawlins, sunrise is at 6:03 am and sunset at 8:26 pm.