Yea BG2 had all of that. Light rain, wind(as a sound effect) snow, thunderstorm, dust storms, night time (with its accompanied special effects).
At least why cant some areas be at a different time of day just boggles the mind. I refuse to believe the game wont have that.
Larian worlds have no sense of passing time. No calendar, clocks, time of day...
Part of that design philosophy of Larian is why the game will feel more like a story-book than an RPG. There is never any sense of time in Divinity Original Sin/Divinity Original Sin 2; camping seems like an attempt to rectify this as the game immediately changes to night time for that sequence, granted you camp in the same area each time (I'm assuming it will change by "Act" to match the general area).
A lot of what the Divinity Original Sin games and to an extent thus far in Early Access this game does is create set-pieces; dynamic systems like weather/day & night cycles/random encounters are not something they have demonstrated in any of their previous works. Considering the potential scale of the game these features are unlikely to be added unfortunately.
