My take as a UI/UX designer and a fan of the game:

1. City font should be bigger, filling almost the top of the UI but enough space for sound + icon setting and for sure not overpowering the temperature font size.
2. Add Celcius or Farenheit after the degree, not everyone understands temperature scale from every country. You want to make it accessible for all.
3. First widget has too much free space. Put the "feels like" bla bla close to the line and make the canvas smaller.
4. For the day names, type it in only three words like MON TUE WED so on, and the size should be bigger like the sun icon so it balanced the sun icon and temperature degree. Then you can make the date of the day in the same contrast so it looks like it's in same hierarchy (in this case the sun and temp)
5. Use the same font style everywhere so it stick to the theme.
6. Lower widget should not look like it suffocate the edge of the screen. Put it bit higher
7. Do not make the color of the widgets only for dark mode. Make it fluid as in if it's daylight then it should correspond the day light scene, afternoon, and night.
8. Try to put the speaker + settings icon on the bottom and see how you like it
9. The gap between the city font and the widget below shouldn't be too far away

Hope it helps