Just thought about this, previous characters already reacted to certain weather conditions like when it would rain, he'd wipe the rain from his face (IV), but it would be pretty cool if there was a storm, you'd actually feel the wind forces pounce in on you. Making your clothes flail around a bit (like when on a bike) and making walking more heavy going upwind, and downwind much easier (including the body animations that go with that ofcourse, even walking a bit criss-cross to hold your balance)
Come to think of it, if they include a severe storm every now and then (not too much preferably), you could even get hit by flying debris. (thrashcans, newspaper in the face/windshield,...)
Just dreaming, but it'd be cool nonetheless if they'd incorporate "little" things like this