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 not accurate. Apple Watch has its own weather App forecast and rainfall data source, which has been connected in series with the weather data of TheWeatherChannel, a well-known foreign meteorological unit. Although the official weather data of Apple Watch claims that TheWeatherChannel was used in iOS 15.2 or earlier, it is still used in iOS 16. IOS weather data sources are not included in the data of the Meteorological Bureau. The sources of weather data are all data provided by foreign meteorological institutions, and most of the service customers of foreign meteorological institutions come from Europe and America. It is impossible to manually correct the global forecast data for Asia, resulting in inaccurate real-time weather data and forecast of Apple Watch, and the weather forecast temperature is much lower than other forecasts.