Usually I use the default Samsung weather app, but when I'm on my PC https://wttr.in/ is a fun one, and you can even get terminal-readable output by using something like cURL!
Nice, I made something similar with https://github.com/ip2k/we4ther?files=1 a decade ago. It used to be up at we4ther.com but I hadn't updated the code in a long long time and didn't bother migrating it to my latest server. The free MaxMind GeoIP DB is def good enough to detect location (this was before the browser location API) close enough to give accurate weather.