Re: What is the coldest temperature recorded on pluto?

Not much information is known about Pluto's temperature. Pluto appears so small in telescopes that I doubt direct temperature measurements can be taken.

The general agreement I have found on the Web is a temperature range of 35K to 45K. That is equal to -228 to -238 C or -410 to -428 F. [This kind of information about Pluto would become much more certain if the Pluto-Kuiper Express mission flies.] For a good write up on Pluto go to The Nine Planets. Also check the Pluto write up at the Views of the Solar System.

I would not be surprized if Pluto can get colder than 35 K or hotter than 45 K. At its poles, it has a 124 year night and a 124 year daytime period.