accuweather integration uses the AccuWeather web service as a source for weather data for your location.
To generate an AccuWeather API key, go to AccuWeather APIs page, register and create application with product Limited Trial.
To add AccuWeather to your installation, go to Configuration >> Integrations in the UI, click the button with
+ sign and from the list of integrations select AccuWeather. By default, the values will be taken from the Home Assistant configuration. Weather forecast is not enabled by default. You can enable it in the integration options.