Working with processes in CLI application

Hey guys.

I have converted the little elixir&OTP temparature application into an CLI app but I have an issue of receiving the list of tempratures from the main process.

How can I use processes in an CLI app?

My repo

https://github.com/johninvictus/concurrent_weather

How am getting temparatures from a list of cities.

./concurrent_weather "Thika" "Nairobi"