Trying to get and use JSON from a URL

Absolute JS newbie here. I am able to use fetch() to get JSON from a URL but I can't figure out how to do anything with that JSON outside of the fetch itself.

Here's my code (API key and GPS redacted):

fetch('https://www.airnowapi.org/aq/forecast/latLong/?format=application/json&latitude=X&longitude=X&distance=50&API_KEY=X')
        .then(result => result.json())
        .then((out2) => {     
            console.log('Fetch Output: ', out2);
        }).catch(err => console.error(err)); 

Any code that references out2 other than console.log() call gives an error that out2 is undefined. How do I get access to out2 anywhere else?