Figure 6-46Temperature and Pressure in the Venusian Atmosphere The pressure at the Venusian surface is a crushing 92 atm (1296 lb/in²). Above the surface, atmospheric pressure and temperature decrease smoothly with increasing altitude. The temperature decreases from a maximum of nearly 750 K (890°F) on the ground to a minimum of about 173 K (−150°F) at an altitude of 100 km (62 mi).