Thanks to the TouchWiz launcher on your Galaxy Note 4, you can see the latest weather condition on the lock screen.To add weather forecast on Note 4 lock screen, do as follows:
1. Open Settings and go to the Device tab
2. Tap to open the Lock Screen settings
3. Now, under the screen security option, tap on the "Show Information"
4. To view weather forecast, simply mark the Weather option
**Note that to get the accurate weather condition, turn on the location services