Hi, I also have the 3-day forecast tile on my dashboards and they're up-to-date. You already have the forecast tile displayed so I'm not sure this will help but I do have a wiki page on getting that device setup in the hubitat - here
Is the weather device on the hubitat updating? I looked at my weather device (screenshot below) . Double-check that you have the API key set as well as the polling intervals set.
If you click on "Events" in the hub you should see recent updates. Here's the OpenWeatherMap driver link too which would have more details for setting it up