Surface pressure:  92 bars  
Surface density:  ~65 kg/m3
Scale height:  15.9 km
Total mass of atmosphere:  ~4.8 x 1020 kg
Average temperature:  737 K (464 C)
Diurnal temperature range:  ~0
Wind speeds:  0.3 to 1.0 m/s (surface)
Mean molecular weight:  43.45 g/mole 
Atmospheric composition (near surface, by volume): 
    Major:        Carbon Dioxide (CO2) - 96.5%; Nitrogen (N2) - 3.5%
    Minor (ppm):  Sulfer Dioxide (SO2) - 150; Argon (Ar) - 70; Water (H2O) - 20;
                  Carbon Monoxide (CO) - 17; Helium (He) - 12; Neon (Ne) - 7