Hi @Dan Steinke ,
According to my search, I found an official document that says "The administrator or power user can use the WeatherServiceUrl registry key to customize the Weather Bar to use a specific weather service."
Please kindly understand the tag” office-outlook-itpro” which mainly focus on general issues about Outlook desktop client. According to your description, from the Outlook client itself, this functionality is not possible. In order to better resolve your problem, I will add the tag” office-vba-dev”, so that users of their forum can help to see it together.
Thanks for your understanding and hope your issue would be resolved soon.