Rain Improved v1.0 mod for ATS.
And here is update 2.3 of the Frosty Winter Weather Mod for ATS.
This is version 220.127.116.11 of the Foggy Weather mod for American Truck Simulator.
Update 2.0 is out for the Piva Weather Mod made for American Truck Simulator.
This mod simulates the spring water by making changes to the vegetation, daylight hours and temperatures.