EnVyReMix

Instructions

 Lockscreen Weather

Navigate via iFile to Library/Themes/EnVyReMixLS

Inside this folder locate the LockBackground.html

Look For: 

<!-- Weather Script -->

var locale = "38671"

var isCelsius = false //true|false

var useRealFeel = true //true|false

var locale is where you will enter your weather code or zip code.

Set Lockscreen Wallpaper

To set background on the lockscreen go to settings/Wallpaper set image to lockscreen

Respring.

To Get rid of Double Clock on Lockscreen.

Install Lockscreen Clock Hide (free) from Cydia.