naptune
Neptune(If you include dwarf planets it is Eris)
Uranus has a very cold average temperature of about -224 degrees Celsius (-371 degrees Fahrenheit). This makes it one of the coldest planets in our solar system.
Neptune, the coldest and furthest of our solar systems eight planets.
Venus has the highest average surface temperature among the inner planets. Its thick atmosphere traps heat, leading to extreme temperatures of around 467 degrees Celsius (872 degrees Fahrenheit) on its surface.
The average high temperature on Uranus is around -197 degrees Celsius, while the average low temperature is around -224 degrees Celsius. Uranus is one of the coldest planets in our solar system due to its distance from the Sun and its lack of internal heat sources.
Saturn is much colder than Earth, with average temperatures around -288 degrees Fahrenheit (-178 degrees Celsius) in its upper atmosphere. In contrast, Earth's average temperature is about 59 degrees Fahrenheit (15 degrees Celsius). Saturn's distance from the Sun and its gaseous composition contribute to its frigid temperatures, making it one of the coldest planets in our solar system.
Venus has a surface temperature that is closest to Earth's temperature, with an average of about 864 degrees Fahrenheit (462 degrees Celsius) due to its thick atmosphere of carbon dioxide which creates a greenhouse effect.
20 degrees Celsius is about 68 degrees Fahrenheit. This is an ideal temperature for a planet to support carbon-based life, as water is a liquid between 0 and 100 degrees Celsius, or 32 and 212 degrees Fahrenheit.
WARMER. Comment: It's not very warm though. The average temperature is well below zero degrees Celsius.
The vacuum in space only has one temperature: -273.15 degrees Celsius. The planets' temperature do vary, though.
The average temperature of Jupiter is around -145 degrees Celsius (-234 degrees Fahrenheit) when facing the sun. This is due to the vast distance between Jupiter and the sun, which results in relatively lower temperatures compared to planets closer to the sun.
Actually, Neptune is not hot but, it is to cold because it's mean surface temperature is -200.15 C ( 387.27 F).For more information about the Planet Neptune or the other Planets, visit the link below: