To address the issue of not receiving complete data in the AccuWeather app, you can follow these actionable steps:

1. Check Internet Connection:
Ensure that your iPhone is connected to a stable internet connection. AccuWeather requires consistent connectivity for accurate data updates.

2. Update the App:
Make sure you have the latest version of the AccuWeather app installed. Go to the App Store, search for AccuWeather, and tap 'Update' if it's available.

3. Adjust App Permissions:
- Open your iPhone's Settings.
- Scroll down and select AccuWeather.
- Ensure that all necessary permissions are enabled, especially Location Services and Notifications (toggle Persistent Notification Updates to ON) - learn more.

4. Clear Cache:
Consider clearing the cache of the app:
- Go to Settings > General > iPhone Storage.
- Find AccuWeather, tap on it and select Offload App. This will clear temporary files but keep your documents and data.

5. Restart the Device:
Restart your iPhone to refresh the app and system functionalities. This can resolve minor glitches that may prevent data updates.

6. Reinstall the App:
If issues persist, uninstall AccuWeather and reinstall it:
- Press and hold the app icon until the menu appears, select Remove App, and then confirm.
- Go to the App Store, download AccuWeather again, and set it up.

7. Check for Software Updates:
Sometimes, a pending iOS update can affect application performance.
- Go to Settings > General > Software Update, and install any available updates.

8. Enable Background App Refresh:
Ensure that background app refresh is enabled for AccuWeather:
- Go to Settings > General > Background App Refresh and toggle it for AccuWeather to ON.

9. Contact Support:
If none of the above steps resolve the issue, consider reaching out to AccuWeather's support for assistance. Visit their help center here - learn more.

Following these steps should help you resolve the issue with incomplete data in your AccuWeather app. If the problem persists, it may be a temporary issue on their end, so checking back later could also be worthwhile.