Here's how Google Home gets the data for its weather forecast

For Google Home, WeatherNext 2 provides hourly and daily forecasts, along with MetNet and other models, according to Google.
IEEE

Evaluating Spatial Representativeness Across Multiple Scales for a Comprehensive Ground Validation Network Using Landsat Land Surface Temperature Data and Random Forest

Abstract: Land surface temperature (LST) products require rigorous validation before widespread application, and the spatial representativeness of ground validation sites plays a critical role in ...