Think you could do this in update? I'd like to see it get dark and the rain start pouring Or after a long cold night when day breaks snow starts to fall.Then if added we could have snowball fight hahaha.And be able to track pple from there foot prints.
The weather itself is very complex (ask a weather forecaster ), so it will not be available for a long time. Things like day(night aren't that complex, but I need to find a way to implement it in the graphics engine.