[jp57]

It's an interesting idea, but some of the image semantics seem weirdly wrong. In particular, the sky shouldn't be light at night, and the sun shouldn't be high at sunrise.

If you have to learn counterintuitive things like "the appearance of the sun anywhere in the sky indicates sunrise", and "nighttime is indicated by, well, idk what exactly, but it's not darkness", it kind of fails at it's main purpose, I think.

EDIT: I'll add that many weather apps have a left-to-right timeline of some sort, and indicate sunrise and sunset with intuitive iconography.

EDIT2: The Windy.com timeline view shows sky condition, day/night, moon phase, temperature, precipitation, and wind speed and direction in a nice compact left-to-right timeline. (click the summary in the upper left)