http://www.pcgamer.com/pubg-september-update-adds-new-town-foggy-weather-has-a-low-probability-to-occur/

After revising its schedule last month, PUBG declared its updates would become less regular so as to maintain a "high standard of quality" moving forward. The first patch post-shift is live on the game's test servers today and, as you might expect, it's a biggie. 

As you might already know, fog is en route to The Island. Chris expressed his concerns with this yesterday, and it seems quite a few of you feel the same judging by that post's comments. As in reality, the foggy weather effect "will hinder player sight on the map"—however the fact that this weather effect "has a low probability to occur" might console those less sold on the idea.