External Temperature stopped displaying on Nest App

[Martyn3]

Hi, my nest thermostat 3rd generation has been working fine for the last 2 years, and I control the thermostat via the nest app. I have noticed in the last 4 days that the Nest app no longer displays the external temperature. It still shows internal humidity but not the external temperature.

Any ideas if this is a recent issue, and what I can check to try and get this functionality back?

[CoolingWizard]

@Martyn3 , the external or outdoor temperature is obtained over the Internet.  Perhaps the weather server Nest is using is down.  

AC Cooling Wizard

[Martyn3]

For some reason my postcode was missing one digit. I have now updated to full postcode and is now displaying the external temperature. Every day is a school day!