Why is the weather forecast temperature of Apple Watch much lower than other forecasts?

The weather forecast temperature of Apple Watch is much lower than other forecasts because the weather forecast of Apple Watch is inaccurate. Apple Watch comes with its own weather App forecast and rainfall data source, which has always been connected in series with the weather data of the well-known foreign meteorological unit TheWeatherChannel. Although the official weather data of Apple Watch claims that iOS15.2 or previous versions all use TheWeatherChannel, it is still in use in iOS16 version. IOS weather data sources are not included in the data of the Bureau of Meteorology. The weather data sources are all data provided by foreign meteorological units, and most of the service customers of foreign meteorological agencies are from Europe and America. It is impossible to manually correct the global forecast data for Asia, which leads to inaccurate real-time weather data and forecast of Apple Watch, and the weather forecast temperature is much lower than other forecasts.