You will need an OpenWeatherMap API key for this feature to work.
Simply register here https://openweathermap.org/
Then when logged in get the API Key in your “API Keys” tab
This feature offers a weather widget in your app to display the forecasts for a particular city or for your users location.
You just have to choose a country and a city, then save.
This is how it looks like in your app:
Your users will be able to change the location to their own, if they click/tap on “Change location“.