Following a request to look into this in the general LG Volt forums, I did some digging and figured out how they did it over on the G2. This will set your LG Weather widget background to either black or transparent based upon which apk you choose. If anyone wants to know how I did this, just lemme know and Ill post a mini guide in a comment below.

I take no responsibility for you messing your phone up (follow the directions and you will be fine)

NEED:
Root
Root browser app of some sort
USB cable

Transfer either Black-LGWeatherTheme.apk or Transparent-LGWeatherTheme.apk to your internal sdcard, i used adb but you can use mtp/regular plug in phone copy to sdcard method if you want.

Backup your old LGWeatherTheme.apk from /system/app, or dont lol. I didnt, but you can grab a stock copy from the zv4 rom zip if you need it.

Once its on your sdcard, open up a root browser and rename the file to LGWeatherTheme.apk. Then take that apk and copy it to /system/app, set permissions to rw-r-r, and reboot.

Once you reboot, your background for your weather widget will be either black or transparent based upon which apk you chose.

Happy flashing!

Black version
Black-LGWeatherTheme

Transparent version
Transparent-LGWeatherTheme

 

Mine for a writeup on how to do this when I get a chance. Also if anyone wants me to try to theme anything else, lemme know. Im always up for a good challenge.

 

no problem, my pleasure.

one thing though, did you happen to notice if the 2x4 and 1x4 icons on the g2 had transparent backgrounds? the reason i ask is the apks i posted dont, but if you want me to look into it i can. its really easy to do, just takes a little bit of time.

 

Yep sorry I said icons, meant widgets.