Get value inside Node Red

[inland fractal]

How can I gain access to a value from a object in Node Red in order to create a message that I want to send as a notification? I am using the weather_forecast action to get that result, but then I want to create a message that says "The weather will be CONDITION today. The temperature will be between TEMPLOW and TEMPERATURE"

[pseudo trellis]

You'd have to figure out how to use responding services in Node Red, if that's even possible. If it's not possible, you'd need to make a template entity that holds the data.