WeiMoote
Artist of Cute Stuff
So, I moved a new playable character into town, when the weather was intended to be cloudy. And sure enough, when that happens, it went to sunny by default, even on the TV. The next day, it was sunny as expected. I went to the island, and done a few games, and when I went back home, it was all rainy.
So, being the curious sort I am, I decided to try to replicate this.

So, I time traveled back a day to see what the weather for the next day was. Sure enough, it was cloudy before moving the new person in. So, I decided to move in a new PC.

It defaults to sunny. So, I moved her in, and went to the next day.

This was done the next day. So, I went to the island, and played a game.

After playing one game, I went back home, and... Well, it was rainy.
I think I may have found a glitch of sorts. If this isn't new, sorry for wasting everyone's time.
So, being the curious sort I am, I decided to try to replicate this.

So, I time traveled back a day to see what the weather for the next day was. Sure enough, it was cloudy before moving the new person in. So, I decided to move in a new PC.

It defaults to sunny. So, I moved her in, and went to the next day.

This was done the next day. So, I went to the island, and played a game.

After playing one game, I went back home, and... Well, it was rainy.
I think I may have found a glitch of sorts. If this isn't new, sorry for wasting everyone's time.