All though a weather system would be cool, I fell the community wouldn't agree with how the different weather effects different ships and ship parts.
It would be awesome to see hail storms puncture your balloon, strong winds throwing you off course, heavy rain causing crew members to slide around the ship when their moving and really hot temperatures that cause things to burst into fire randomly.
But at the end of the day this will make the RAM usage go up and overall lower some peoples FPS
But this would still be awesome!!!!