How Hot Does It Get on Neptune?
The hottest Neptune ever gets at its surface, which is defined as the point at which its thick atmosphere is at the same pressure as the Earth's atmosphere at sea level, is -296 F. These temperatures are found at the poles based on Neptune's seasons.
Neptune is one of the coldest planets in the solar system, with an average temperature of -356 F at the edge of its atmosphere and -346 F at its surface. It is slightly warmer than Uranus despite being farther from the sun. This is because its interior is in motion more than that of Uranus, and some of this kinetic energy is converted into heat.