Can anyone recommend a good app to replace it? No ads, lightweight etc.
I’ve been happy with Carrot.
https://weather-sense.leftium.com: just a web app, but you can add it to your home screen to access like an app[1]
MyRadar, but a bit of the opposite.
I've learned that I just want to look at the radar. There's a big difference between "it's going to drizzle all day" and "spotty storms within 25 miles of you"
Edit: Google Gemini suggested Hello Weather and loving it so far.
If you are interested in German weather, I can recommend the DWD WarnWetter App. It is so good that the competitors sued when it was free. Now it costs a one-time fee of about 3€.