OpenWeatherMap

Register on the OpenWeathermap website, and go to the API Keys page — that's the key you'll need.

In config.toml, choose to use the openweathermap provider.

[weather]
... your location details from the location step ...
provider = "openweathermap"    

Then add a section for the openweathermap provider with your API key.

[weather.providers.openweathermap]
api_key = "xxxxxx"