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.
Hourly Forecast Detailed. 1  0am:The Keystone, CO forecast for Apr 16 is 34 degrees and Clear. There is 43 percentage chance of rain and 6 mph winds from the South-Southeast. 2  3am:The Keystone, CO forecast for Apr 16 is 34 degrees and Clear. There is 44 percentage chance of rain and 7 mph winds from the South.