I'm all for weather effect just like FFXI such as Rain, Storm, Clear, Sunny, etc while adding graphic touch such as if it's Windy in the desert we can see sand particles flying in the air as an example.

But weather effecting the player via status that might be a bad thing cause if not done right people will complain about it.

So Graphically yes, but game play mechanic wise I wouldn't want it. Just my thought.