The Simple Answer: The color of a star's visible light indicates its surface temperature: a relatively cool star glows red (longer wavelength), and very hot ones glow bluish-white or even blue (shorter wavelengths).
Average Weather in September in Sheridan Wyoming, United States. In Sheridan, the month of September is characterized by rapidly falling daily high temperatures, with daily highs decreasing by 14Â°F, from 82Â°F to 69Â°F over the course of the month, and rarely exceeding 93Â°F or dropping below 53Â°F.
Over the course of the year, the temperature in Cheyenne typically varies from 19Â°F to 83Â°F and is rarely below 2Â°F or above 91Â°F. The warm season lasts for 95 days, from June 10 to September 13, with an average daily high temperature above 74Â°F. The hottest day of the year is July 17, with an average high of 83Â°F and low of 57Â°F.