Wait is over,Here it is :
1.) Install this apk file and click done(don't open).
2.) Then go to home screen and select add widget.
3.) This widget is on last page of your phone. Bring it to your Home Screen.
4.) It shows an error but no worry. Tap on Widget and Select your City.
5.) Now you can see "Galaxy S5 Weather Widget". Enjoy !!
if i helped you.