What is the coldest/hottest temperature on Venus.

[m1omg]

I know there is a little temperature difference between majority of places, but I am just curious.Venus Express probably measured it.

[m1omg]

Sorry, I've put it into a wrong section.Please, move it to Q&A.

[m1omg]

No answers?Why, even Venus must have some temp. differences but how large?

[01101001]

Topic Is Venus's dark side cold?:

Average temperature: 737 K
Diurnal temperature range: ~0
[From NASA Venus Fact Sheet]

There's probably not much variance from equator to pole either. It's a cloudy place with a thick atmosphere. The sun doesn't directly affect the surface much.

North Bay Astronomy Club, Brent's Old Astronomy Pages, Temperature (OK, not the most respectable-sounding source):

Venus also has the smallest temperature range of any planet, about a few degrees Kelvin (or Celsius) difference, from high noon at the equator to deep winter at the poles.

[Noclevername]

I would think altitude would make more of a difference than latitude. That lower atmospere's been building a lot of heat for a long time, and transferring it to the surface.

[m1omg]

I would think altitude would make more of a difference than latitude. That lower atmospere's been building a lot of heat for a long time, and transferring it to the surface.

What is the temperature and pressure, for example, on the Venus highest peak of Maxwell Montes?

[neilzero]

According to another thread, sulpheric acid decomposes to SO3 and water at an altitude of about 25 kilometers. This takes a lot of heat, so 25 kilometers may be 20? degrees c cooler than the surface. The atmosphere cools gradually to about 55 degrees f at about one atmosphere pressure, after which it warms with altitude. Likely the mouth of an eruptig Volcano is the hottest spot = 1500 degrees c?. The 55 degrees f is likely the coolest spot. Sory about mixing metric and non-metric units. Neil

[m1omg]

http://en.wikipedia.org/wiki/Atmosphere_of_Venus

Height
(km) Temp.
(°C) Atmospheric
pressure
(x Earth)
0 462 92.10
5 424 66.65
10 385 47.39
15 348 33.04
20 306 22.52
25 264 14.93
30 222 9.851
35 180 5.917
40 143 3.501
45 110 1.979
50 75 1.066
55 27 0.5314
60 -10 0.2357
65 -30 0.09765
70 -43 0.03690
80 -76 0.004760
90 -104 0.0003736
100 -112 0.00002660

no, temp. changes rapidly with height, and I am talking about SURFACE.

[Mr. Milton Banana]

Years ago, I read in a book that the temperatures on the "sunny" side of Venus at the surface ranged from 900 degrees Fahrenheit to 1300 degrees Fahrenheit. Night temperatures rarely went below 600 degrees Fahrenheit.

I *wish* I could remember the book, but it was more than 20 years ago. I do also remember reading that temperatures at the surface could get hot enough to melt rocks to a small degree.

Feel free to correct this-since this info has to be at least two decades old.

[Kullat Nunu]

no, temp. changes rapidly with height, and I am talking about SURFACE.

Well, naively thinking and based on those numbers the coolest place on Venus should be the top of Maxwell Montes. At the height of 11 km it should be almost 100 K cooler than the zero level. The hottest place should then be the deepest point of Venus (Diana Chasma?).

[m1omg]

Years ago, I read in a book that the temperatures on the "sunny" side of Venus at the surface ranged from 900 degrees Fahrenheit to 1300 degrees Fahrenheit. Night temperatures rarely went below 600 degrees Fahrenheit.

I *wish* I could remember the book, but it was more than 20 years ago. I do also remember reading that temperatures at the surface could get hot enough to melt rocks to a small degree.

Feel free to correct this-since this info has to be at least two decades old.

It is definitely incorect.Venus has almost no temperature difference in the night.Atmosphere holds heat, and actually there is dark on the surface, about 2000 lux compared to normal sunny Earth's 32000 lux or even more.
Temperature on Venus is caused by a runaway greenhouse effect.Avg. temperatures on the "sea levels" are about 450 degress Celsius = 842 degress Fahrenheit =723.15 degress Kelvin, and pressure 97 atmospheres.On the highest peak of the Maxwell Montes there is 348 degress Celsius = 658.4 degress Fahrenheit temperature and pressure of 33.04 atmospheres (the highest peak is approx. 15 km high).
I don't know from what book you get that incorrect temperature data, but it was probably amateuristic and speculative, because the first probe that did the Venus flyby, accurately measured the surface temperauratures at about 425 degress Celsius = 797 degress Fahreheit, and later Soviet Venera probes did a little correction, and state the avg. temperature of Venus's surface at 0 km altitude at about 450 degress Celsius = 842 degress Fahrenheit.

Image of the surface of Venus;