Astronomy/Rain in other planets.
Is there a possibility of rain occuring in other 8 Planets?
There certainly is! Astronomers suggest that there are frequent rainstorms on Venus (albeit with sulfuric acid laced liquid, rather than water) and there is clear evidence of rain in ages past on Mars. Mercury has no real atmosphere, so that's not an option. And the other planets are huge gas giants that are covered in clouds--and those cloud must sometimes condense into precipitation.