posted on Apr, 8 2008 @ 01:03 PM
Yes, there are clouds on mars, usually very whispy and not very moisture laden. Not all clouds produce rain, in fact, only a couple of types of
clouds offer rain, these being nimbostratus and cumulonimbus. The clouds that form on mars don't appear to be of either of these types. Also, the
air in mars is far too cold for rain to fall, as rain is very temperature dependant.
It is believed that the clouds are formed from the trace amounts of water in the atmosphere freezing at night when it is extremely cold, and they soon
disipate when the sun rises thawing the ice. However, the amount of water in the atmosphere is nowhere near what would be required to cause rain.
[edit on 8-4-2008 by sensfan]