About Data | Weather Underground

About Us About Our Data Contact Us About Our Data About UsAbout Our DataContact UsForecastsAll of our forecasts are generated from our proprietary forecasting system that leverages our vast amount of neighborhood weather data that we get from our community - we refer to the system as BestForecast™.Our ever-expanding network of 250,000+ personal weather stations is the largest of its kind and provides us with a unique ability to provide the most local forecasts based on actual weather data points. BestForecast™ uses the most innovative forecast models available and cross-verifies their output with all of the localized data points. Only our unrivaled amount of local neighborhood weather data can generate forecasts for your front door.For US locations we give users the option to switch to view the forecasts generated from the National Weather Service’s National Digital Forecast Database (NDFD). In a step to create an unprecedented level of transparency to our forecasting, we publish the r...