Polluted Climate is a mod that slightly modifies the weather in the game. The weather in this mod has been altered from Fallout 4 since it was too brilliant and colorful for the post-apocalyptic setting, where the temperature must be harsh and cruel.
To give Fallout 4 the same barren appearance of earlier Fallout games, the alteration was merely a minor graphic overhaul.

Polluted environments have less intense hues, a higher likelihood of hazy and foggy conditions, and more frequent radiation storms. Be careful as the radiation storms that are both dusty and wet cause more radiation harm than other types.