I have my old Kindle displaying the weather through the built-in browser, using this code:
https://github.com/matopeto/kindle-weather-dashboard
If you want to display something more, you could just self-host a page.
https://github.com/matopeto/kindle-weather-dashboard
If you want to display something more, you could just self-host a page.
Come to think of it I think the Kindle browser is based on WebKit, so it probably runs any JS that the version of WebKit supports, but given the low-power processor and the 0.5 FPS display, you probably won't get anything too crazy to work.