440 kelvins
Mercury is a very hot planet. Mercury is the closest planet to the sun.
"Higher temperatures will result in the mercury in the thermometer expanding and rising, while lower temperatures will cause the mercury to contract and fall."
Surface temperatures place Venus above Mercury.
Mercury
Mercury has very high temperatures and is made up of hard rock. We are like a newborn baby - our planet can't resist such high temperatures, and that is why we have an atmosphere. Mercury can resist all that from the sun.
The planet Mercury does not have weather patterns just wild temperatures.
Hot. Mercury is very close to the Sun; the sun-side temperatures on Mercury will melt most metals.
You would have to put mercury in very low temperatures until it was a solid.
The temperatures on Mercury are too extreme for humans to survive. There is also no oxygen on the planet.
Mercury is much closer to the sun than Venus. It has less of an atmosphere, much higher temperatures, and a very short year. Venus has an very sulfur-rich atmosphere, cooler temperatures than Mercury, and a longer year than Mercury.
Mercury
I know that the highest it can reach is 800.