Guys, I may make a tut on how to have rain :]
It's easy (NBTedit) for who knows it.
I don't know, if there is some counter for rain, but there is one for thunder (my was like 105 000, day is 24 000, I hope). But there was a value called Raining on 0, I changed it to 1 and I had rain ! Rain counter appeared saying like 90 000 (after 2 days ...), so I better turned it off again :D