What is the average temperature of Uranus?
The atmosphere of Uranus is composed of 83% helium, 15% methane and 2% methane plus trace amounts of other gases such as ethane. The average temperature of the surface of Uranus is 49Â° Kelvin or -224Â° Celsius.What makes the planet so cold is that it has a low internal temperature.he atmosphere of Uranus is composed of 83% helium, 15% methane and 2% methane plus trace amounts of other gases such as ethane. The average temperature of the surface of Uranus is 49Â° Kelvin or -224Â° Celsius.