A lot of people don’t know this but for the Last Day and Night there was supposed to be a Storm, and if people didn’t know for the Story Expansion a Storm is going to hit during the same time that Original Storm was gonna happen, so it would be nice to bring it back to fit together.
Along with this Random Weather should happen till that point of the Game and during Free Roam, some ideas:
-Rain
-Fog
-Wind
-Thunder and Lightning
All of these can get mixed with one another to make for some replay ability.