Comments below this answer to Would there be snow, rain, fog or clouds in a deep, sealed, subsurface cavern on the Moon if water were present? point out that the NASA Vehicle Assembly Building originally had "weather" and the Wikipedia article confirms that something like this happened before a moisture reduction system (read "giant dehumidifier") was added.
Question: Before that was added, what did the so-called "weather" look like? Did it really have clouds? Did it rain?
