I seem to remember seeing that there were updates every 20 minutes but I may be imagining it. I haven’t tried the Weather Automations lately but I never had much luck in the last.
The values are pretty meaningless without more detail anyway. Are they observations or forecasts and where are they from and when?
In the UK the Met Office observed readings are taken on the hour. They used to take about half an hour to appear on data feeds, though they are near instant now, and there are only a limited number of weather stations. So the observed readings for my home could be from an hour ago, at an airfield up a hill five miles away.
So what are The Weather Channel feeding?