Well I'm on the PC and I downloaded he Elsweyr mod... but it keeps on raining ingame! I've tried the fw command and releaseweatheroverride but it keeps on insistently raining.... but the moment I step out of Elsweyr it stops raining, but I am RP'ing in Elsweyr where it is usually dry and it ruins the immersion when it constantly rains. Please help! Thanks!

Are you using the Natural Weather mod, by any chance?

To elaborate:

If you are using weather mods and then add an across-the-borders mod that wants to add new weather to the area, this can confuse said weather mods and cause the weather to stick when you enter. Natural Weather, if you are using it, is very old, predating Elsweyr, and thus it is unable to handle across-the-borders mods, so the weather gets stuck.

My suggestion would be to uninstall Natural Weather and install http://www.tesnexus.com/downloads/file.php?id=16544 instead, as it comes with a patch to for across-the-borders mods.

I did have natural weather guys, thanks!