My favorite is the weather station consisting of a rock sitting in a dish suspended by a chain. If rock is wet, it is raining. If rock is moving it is windy. If you can't see rock, it is night. If rock casts a shadow, it is sunny

More details: https://en.wikipedia.org/wiki/Weather_rock

Thanks! I should have known that it would have a wiki entry. Although, I think some of the rules are a bit meh. "if rock is warm" you're not meant to need to touch it as it's meant for a quick glance kind of tool. also, as it mentions, the rock is a finely tuned instrument, so thank you for not touching.

if the rock is gone....tornado.

I appreciate that it's just a nice picture that happens to update with the weather, but there's no reason to only use this for your current physical location. It accepts any place in the world (and also fictional places), so you could see a picture of what it looks like where your distant family member or friend is, among many other things.

When I look at the weather app, I don't need to know what the weather is now but what the weather will most likely be later when I'm outside.