Wx

 Wx (abbreviation for weather) 

 

https://wttr.in is very quick and ad-free.

 

 

https://noadsweather.com is very detailed and ad-free.

 

Both work with web browsers, no app required.

https://www.howtogeek.com/196087/how-to-add-websites-to-the-home-screen-on-any-smartphone-or-tablet shows how to put either of those web links, or any other web link, on your phone's home screen. Since apps can track you & steal your data, just using a web browser on your phone instead of an app can be a good idea.

https://tinyurl.com/wx-phone-home is a short link to this page.