They don't.
Neptune is −218°C (55.1K / -360.4°F).
Uranus is -224 °C (49K / -371.2°F ).
Neptune, the 8th planet, is the furthest planet from the sun, however it has an exposed core composed of extremely hot molten ammonia. Which provides a little heat to the planet, but still not enough to prevent it being freezing.
Because of Neptune's very hot core, Uranus, the 7th planet, is the coldest.
Their cold temperatures are because they are too far from the sun for its heat to warm them.
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.
Neptune is almost the same size as Uranus. Both planets are similar in diameter, mass, and composition.
Uranus. it might not just be Uranus because there are so many sizes of planets
Neptune and Uranus
Uranus and Neptune are roughly the same size.
Neptune −201 °C. Uranus −197.2 °C.
Neptune is pretty comparable to Uranus, with Uranus being slightly larger, and Neptune slightly heavier. Neptune's radius at the equator is is about 3.88 Earths, while Uranus is about 4.0 Earths for the same measurement.
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.
Uranus
Neptune is almost the same size as Uranus. Both planets are similar in diameter, mass, and composition.
Uranus is the coldest planet. Neptune is the furthest from the Sun, but it has a much hotter core temperature than Uranus; Neptune's core is at around 7000 °C. Uranus's core's temperature is at around 4737 °C.
Uranus is roughly the same size as Neptune because Uranus is 51 118 km in diameter and Neptune is 49 532 km in diamter From Lex Luther
No planet is the same as Neptune. Uranus is similar in size, but is quite different in its composition.
The hottest (surface temperature) is Venus then, getting colder: Mercury, Earth, Mars, Jupiter, Saturn, Neptune and Uranus. (In fact Neptune and Uranus are very similar in temperature.)
Uranus and Neptune are both planets in our solar system. Barney9
Neptune is very much like Uranus in size.
Neptune and Uranus have similar average temperatures, at -200C and -195C, respectively.