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.
Shetland Islands Description. The Shetland Islands, a large group of nearly 100 islands (30 inhabited), are the northernmost part of the British Isles. The current population is estimated at just under 22,000, with the vast percentage of people residing on Mainland (the largest island). Lerwick is the largest populated town. It was during the 9th century AD when Scandinavian Vikings began establishing colonies on the Shetland Islands, and the region fell under the rule of Norway until the 14th century when the islands were pawned off to Scotland.