I used to use AccuWeather as a weather app. It seems that there are at least some weather apps that sell customer location data to third parties. While I don't know that AccuWeather in particular does this, I now don't trust this kind of app with my location and instead use Google's weather app because Google knows my location anyway and does go to some effort to prevent it's competitors from stealing their data.

If you do give a weather or dating app location permissions, be aware that the real world consequence could be that your location data can be brought. Potentially, this is true even when you are located in the EU.