nevermind it just happened again.... now I'm stuck with a foggy day with just a tad bit of sun, changing maps, reloading my save doesn't change it, so it looks like what I will have to do is just keep changing the render until I get a stuck weather that I like.
open it and look for the weather information, is the current and the upcoming one different ? then it should work, if its both the same, you would have to do it again, but for me it worked, at the moment I have af_rain and next weather cycle in console is af_thunder
it takes longer time for the weather to change. I don't think that a map change automatically changes it anymore, can't remember this being the case in lost alpha.