There's no such thing as a temperature colder than absolute zero, which is -273.15°C!
Most of the gas giants give off more heat than they receive from the sun due to their distances from the sun and the extreme temperatures of their cores. Because the core of Uranus is much cooler than the cores of the other gas giants, and because the extreme tilt between its rotational axis and its orbital plane results in large parts of the planet having periods of night that last for decades, Uranus has the lowest atmospheric temperature ever recorded in the solar system, -224° C!
(The gas giants are literally giant balls of gas, so when scientists refer to the "surface" of a gas giant they are usually referring to the area in its atmosphere where the atmospheric pressure is the same as the atmospheric pressure on Earth at sea level.)
it's mercury.the temperature is 450 C during the day and -180 C at night.
In our solar system, the planet with the lowest air temperature is Uranus, with a minimum temperature of about 49 K and a mean surface temperature at 1 bar of about 76 K.
The temperature on Saturn is -180Cº, which is -292Fº. This may be cold, but Saturn is farther from the sun then Earth is. and because it is a outer planet
This is impossible to answer for a planet with unknown conditions or characteristics.
Mercury, the closest planet to the sun, fluctuates in temperature more than any other planet. During the day, its temperature can reach 800 degrees Fahrenheit (430 degrees Celsius), and during the night, its temperature can drop to -280 degrees Fahrenheit (-170 degrees Celsius). This is a drop of about 1,080 degrees Fahrenheit (600 degrees Celsius).
Neptune(If you include dwarf planets it is Eris)
The planet with the lowest average temperature in our solar system is Neptune. Its temperature can drop as low as -360°F (-218°C).
Technically speaking, Neptune is the planet with the lowest surface temperature; however, Neptune does not have a solid surface.
The lowest temperature on Jupiter is 234.43 degrees
Mercury with a surface temperature of 700K in the daytime and 100K in the night
350 degrees in the day time 170 degrees in the night time
The main factor is the planet's rotation that gives day and night.
Neptune is expected to have the lowest surface temperature among Uranus, Saturn, and Neptune. This is due to Neptune's farther distance from the sun compared to Uranus and Saturn, resulting in less solar energy reaching its atmosphere.
It depends on how far away the planet is from a star. If it's close, it's hot. Also, if the planet rotates on its axis there would be a big day-night temperature difference.
The Mesosphere has the lowest temperature of the layers of Earth's atmosphere because Temperature decreases with height in the mesosphere. The mesopause, the temperature minimum that marks the top of the mesosphere, is the coldest place on Earth and has an average temperature around −100 °C (−148.0 °F; 173.1 K)
Mercury has the second lowest density of any planet in the solar system. Saturn has the lowest density of any other planet.
Sagittarius is a constellation in the night sky, not a physical object like a star or a planet, so it does not have a surface temperature.