» Sat Feb 16, 2013 11:58 pm
The Nexus page specifically lists More Rain More Snow as incompatible.
There's also this to consider: If Climates of Tamriel uses scripts, which I assume it does, simply unticking the ESP will not remove it from your save game. You have to load a save from before you added it. Or start a new game. (I can't find the thread right now that discusses this in detail, but Arthmoor weighs in on the subject frequently. You could look through his posts.)
Cheers.
EDIT: If you start a new game with Climates uninstalled (I don't know what all the mod contains, so you may have to completely uninstall it, not just uncheck the ESP), and the lighting still looks wonky, then you may have to regenerate the Skyrim.ini file (MyGames\Skyrim) to reset things.
Good luck!