I built this feature for myself. Using my own weather data when possible has been a desire of mine. Now, my website is set to compare my location to that of the custom stations I’ve designated, in this case two under my control. If I am close, it will use that data. If not, it will go to the fallback provider. The same fallback can be set for regional providers, like the US National Weather service and the Met Office, in case you wander into untracked territory.
The functionality also works for the weather in my sidebar, where you’ll see additional parameters such as the readings from my particulate sensors and any sensors I add in the future.