Uranus has an effective temperature of -357 degrees Fahrenheit. The temperature varies throughout the planet; the temperature of the cloud tops averages -371.2 degrees Fahrenheit.
The hottest part of Uranus is its core, which has an average temperature of 8,540.33 degrees Fahrenheit. The other gas giants have hotter core temperatures that make up for the low temperature from the planets' distances from the sun. Scientists speculate that the low core temperature on Uranus is due to the planet's severe tilt, which leaves Uranus on its side. The atmosphere on Uranus is the coldest of any planet in the solar system, including Neptune, the furthest planet from the sun.