I have watched a few videos of these level and about 60% of them show no rain where as the rest do, so it's either a really widespread problem or they removed the rain in the pc version and the vids I saw with it are on console but that makes no sense at all.
So once and for all is there rain in the pc version lol?
I run the game at max settings with a GTX 580 using 270.61 whql drivers