Ok, I found it (quite some time ago I configured this). It's a workaround for ProjectCars2, the real weather in AMS2 works in my experience. It's actually from mr belowski , Link: GitHub - mrbelowski/PCars2OpenweatherServer. I remember I had to create a free account, probably on Weather API - OpenWeatherMap. Everything else is as he describes under "Proxy Mode". I didn't test it over a year now, but I expect that it still works. Note, there is also a non proxy mode, in case you want to write your own better random weather generator (the game thinks its real weather though).