is mercury or mars hotter
A global view of Mercury, as seen by MESSENGER. Credit: NASA. Mercury sure is hot, but Venus is hotter. Venus is much further from the Sun, orbiting at a distance of more than 108 million kilometers. Average temperature there is a hellish 735 Kelvin, or 462 degrees Celsius â hot enough to melt lead. Venus imaged by Magellan Image Credit: NASA/JPL.