A Vulcan lute on Aldea. The Vulcan lute (sometimes referred to as Vulcan harp, Vulcan lyre, or Vulcan Lyrette) was a twelve-stringed instrument, played on the planet Vulcan, that was tuned on a diatonic scale and noted to be very soothing.
Keystone Average Weather. 1  The highest monthly average temperature in Keystone for July is 54 degrees. 2  The lowest monthly average temperature in Keystone for December is 14 degrees.  The most monthly precipitation in Keystone occurs in January with 0 inches.
Denver averages 3 days in January when the thermometer reaches into the 60s Â°F (over 16 Â°C). The temperatures climbs into the 70s Â°F (over 21 Â°C) once every few years. Typically on 5 days the mercury remains below freezing for the entire day. Nearly every night in Denver during January is below freezing.