[reg45]

Those low temperatures should cause carbon dioxide to sublimate from the atmosphere. The sublimation temperature at normal atmospheric pressure is -78.5°C (-109.3°F). There should be carbon dioxide “snow”.

[Bob434]

Do not lick carbon dioxide snow... it causes cavities

[coloradan]

That temp is only valid when there’s 1 atm of CO2 gas partial pressure. When there’s less, the temp is lower.