They want your information bro I don't think there's any way to stop These ads on any phone lol.. It's just their way to sell your information to 3rd party consumers I don't think you can get around it
Disable the app and download AccuWeather Premium. Sorry, but there's no way to get rid of Samsung's obnoxious ads. ☹️ Some people claim success with system-wide ad blockers. I've tried them all, and none work.
And, of course, any other third-party app will work, but you'll probably need one with an "ad-free" purchase option, or you'll get ads in the free versions as well.