Cold Venus

[choff]

http://www.iflscience.com/space/death-p ... not-so-hot

[hanelyp]

But measurements taken by Venus Express at an altitude of 130 to 140 kilometers (81 to 87 miles) above the surface have revealed the atmosphere near the poles has temperatures far below that on Earth. In fact, the polar atmosphere on Venus drops to -157°C (-251°F), which is 70 degrees colder than expected. It is also 22 to 40 percent less dense than thought.

The temperature and density would seem to both relate to lesser pressure than expected in that portion of the atmosphere.