What is the location you are using? Is it a personal weather station or zipcode, etc?
It is not normal however I can tell you if you are seeing the popup that means all error checks passed. I check to make sure no API key failure occurred, make sure historical data is returned (for yesterday) and also check today’s summary is available. The fact that it’s telling me all of those are available allows me to proceed to the popup (otherwise the app would show an error message). Therefore, right now I believe the issue is with WUnderground. Let me know your location and I can look into the API response and hopefully identify the issue.