It is possible that you have the same problem I have with Apple where the Weather Service returns “Error” and the Last Response is “Weather Data Error”. If you check the System Diagnostics in the left menu, do you have errors like this?
If you do have this problem, in a support ticket Ray suggested I export the configuration. Then check the value of “wterr” in the JSON output. For me it’s almost always “1”. The weather service in the past few months has only been working occasionally. Before that it had always been reliable.