Same here. I cannot find this feature on BerryWeather 2 at all. And I have been wondering what this icon has been for a while as well. I am curious.
go to your app store and under berryweather and click change application. change it to the 4.7 (or whatever software you have) and then it will email you app again but with the proper updates for your OS on your phone. i hope that made sense.
neither do I and it's killing me!! i've searched and asked. someone just tell us!
In berryweather, settings, homescreen wallpaper, put a check mark in the box that says Show Current Conditions of Home Location as Homescreen Wallpaper
I have v 2.0.54
make sure when you chose the link to download that you had the one for 4.7..