To use any of the above modules, you need to connect your OpenWeatherMap account to Integromat. If you do not have an OpenWeatherMap account yet, you can create one at OpenWeatherMap.org.
To connect your OpenWeatherMap account to Integromat, follow the general instructions for Connecting to services. Clicking the Continue button will open a form for entering your OpenWeatherMap API key. You will find the API key after logging into your OpenWeatherMap account under Settings.
Once you have entered the API key and saved the form, you can continue creating your scenario. OpenWeatherMap may take up to 60 minutes to activate the newly generated API key. Your integration may therefore not work immediately after being created. More information can be found here.