The other option would be to build the weather app into Gadgetbridge itself - that'd be really good. But the app @halemmerich mentions should work well :)
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The other option would be to build the weather app into Gadgetbridge itself - that'd be really good. But the app @halemmerich mentions should work well :)