[Mauzen]

MS flight sim is something different than samp
Well, now with the http support it should be possible, a nice idea. You would have to request the current weather on any weather website for a specific location (either submit the location via the url or post, depends on the site)
Then you need to filter the weather out of the html page, this could be quite tricky.
At last, compare the weather to all possible weather strings that the page can show, to find out, what weather it is.