Venus is the hottest planet in the solar system.
Mercury is not the coldest planet because it has more solar radiation than all of the other planets. This is because it is closer to the Sun. However, Mercury is not the hottest planet in the Solar System. See related question.
VenusMercuryEarthMarsJupiter
Neptune and Uranus
It is the coldest planet. If you include the Dwarf Planet Pluto, then Pluto is colder.
The two coldest planets are those furthest from the Sun, they are Uranus and Neptune
Jupiter is not the fourth coldest planet the fourth coldest planet is my private jet because i got big balls and i say so -Pedro Veloz -hahahaahhahaha lolz naw sike Jupiter is the coldest fourth planet in the solar system>
Neptune has an average temperature of -200C, making it the coldest planet in the solar system (at least now that Pluto has been demoted from planetary status).
Mercury -during the day it is very hot -at night it is very cold because of its slow rotation
Neptune and Pluto are the two coldest planets!
Actually Venus is the hottest planet in the solar system because of it's thick atmosphere that taps the heat below the atmosphere. Pluto is the coldest planet because it is the farthest away from the sun.
Neptune is farthest from the SunUranus is the coldest planet in our solar system