Hi @3F, you can connect your weather station to Windy. This manual will help you. – https://community.windy.com/topic/8168/report-your-weather-station-data-to-windy.

However, reported data from stations don't influence forecast. Forecast data we visualize are provided by multiple meteorological centers. It is to see the real-time weather and gives you the option to compare it with the forecast so you can see which forecast model is most accurate for your location.