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 â¦ bluish-white or even blue (shorter wavelengths).
Over the course of the year, the temperature in Shetland typically varies from 37Â°F to 59Â°F and is rarely below 30Â°F or above 63Â°F. The warm season lasts for 82 days, from June 24 to September 14, with an average daily high temperature above 55Â°F. The hottest day of the year is August 6, with an average high of 59Â°F and low of 52Â°F. The cool season lasts for 133 days, from November 26 to April 8, with an average daily high temperature below 46Â°F.
Spoiler alert: Contains plotlines from Shetland series 3, episode 5. Last night in BBC Oneâs Shetland there was a rape. It didnât show the attack on the victim and it wasnât there to shock or to horrify or to act as a lazy way to capture the viewersâ attention. All the same it was visceral and sad, and engaged those watching with real emotional power.