How to update the weather forecast of Samsung 9300?

According to your description, I suggest you try it according to the following steps:

1. Restart the machine and try to change the data connection mode (data connection or WLAN connection).

2. Clear the Sina weather data on the mobile phone and observe (Settings-Account/General-Security-Application Manager-Weather Widget- Clear Data).

3. It may be due to the data server problem of Sina weather, so it is suggested to try to change other time periods.

4. Update the firmware version of the mobile phone.

If the problem still exists, it is recommended that you send your mobile phone to the nearest service center for testing.