To resolve the issue with your M2 Wear watch not displaying weather information, follow these step-by-step instructions:

1. Check Bluetooth Connection: Ensure your M2 Wear watch is properly connected to your smartphone via Bluetooth. This connection is essential for syncing weather data.

2. Verify Location Settings:
- On your smartphone, make sure that location services are enabled. This allows the watch to access accurate weather information based on your current location.
- Depending on your operating system, go to Settings → Location and ensure it's switched on.

3. Update Mobile App Settings:
- Open the M2 Wear mobile application on your smartphone.
- Navigate to Settings within the app.
- Look for the Weather option and ensure that weather services are enabled. Also, confirm that the correct location is selected for weather updates - learn more.

4. Restart Your Devices:
- Restart both your M2 Wear watch and your smartphone. This can help clear temporary glitches that may be affecting the weather app's functionality.

5. Open Weather Tile:
- After restarting, access the Weather tile on your watch. It may take a moment for the watch to acquire the latest weather info.

6. Manual Location Input: If the automatic location setting does not yield results, consider manually entering your city within the mobile app under the Weather settings.

7. Software Update:
- Ensure that both your watch and the M2 Wear app are updated to the latest software versions. Outdated software can lead to compatibility issues - learn more.

8. Check Permissions:
- Check that the M2 Wear app has all necessary permissions on your smartphone to access location data and other related features.

9. Re-Pair Your Devices: If none of the above steps work, consider unpairing your watch and then pairing it again with your smartphone. This can reset any connection issues - learn more.

By following these steps, you should be able to resolve the issue with your M2 Wear watch not displaying the weather. If problems persist, further investigation into specific app or device-related issues may be required.