Hiya!
I actually did something like this where I tracked the tube status, as long as you don’t link the URL you should be okay to go, be careful though, make sure you read the API providers ToS, they may require credit which means you won’t be able to use the API.
Regarding that, Сurrent weather and forecast - OpenWeatherMap might be your saviour, I’m going to make a Tutorial on this, it looks like a fun project to make!