Using a VPN is not a guaranteed solution. Here are some additional details as to why:
Some of the Azure cache servers that are used to distribute Live Weather data are not updating correctly to the latest versions of the data.
The game checks for new data very regularly but not from one server, meaning that from one request to another, the game client might hit a different server. The client can then receive data that is up-to-date OR data that is several hours/days old.
We have requested Azure engineers assistance and are waiting for the results of their investigation. In the meantime we are also exploring other potential solutions to circumvent the issue.