Here's couple of site you can refer to...
http://droidliciousdiva.blogspot.com/2013/06/tutorial-on-beweather-for-android-and.html
and
http://www.brendacarescorner.com/2013/08/how-to-use-custom-beweather-icons-with-beweather-pro/
www.youtube.com/watch?v=CZSW37YBV94
Thank you for posting those instruction...