URWL v6.0 for Fallout 3 with Rain. It changes the colors and lighting of the entire game to more realistic colors and adds rain to Fallout 3.
Weather mod, makes weather colors more natural, bunch of new features added since v5.1. Rain frequency can be set in days now, so you can choose to have it rain once a day, or 4 days or 2 weeks, whatever you like. Also added cinematic filters and DOF filters. There is a scripted night brightness and interior brightness adjuster added too, so you can choose how bright or dark the nights and interiors are yourself.