I went back on my word, and actually completed the weather system O_o including snow!
So here’s a video showcasing it (though it doesn’t do it justice as in-game it’s all very smooth).
Two screenshots of a storm and the snow:
Haven’t yet decided what a storm will do, since I want it to impact the gameplay in some way. I’ll probably make it a condition for a heart event, as well as have all NPCs stay in their homes.
While I completed this, I realized technically, you would be able to play the game forever the way I have it set up right now. You just won’t get anymore special events, and there will probably be some bugs, but other than that, you could technically keep playing. Except for when you marry the fox.