Why is the weather data not accurate on the Xiaomi smartphones?

Weather forecasts cannot be 100% accurate at this stage. The most advanced team in the meteorological community can only achieve an accuracy of about 80%. Weather forecasts measure a range, and it is difficult to achieve fixed points, fixed times, and fixed quantities. Meteorology is a large environment, and the movement of the atmosphere itself is very complicated, which is the fundamental reason why weather forecasts are sometimes inaccurate. It is extremely difficult to predict what just happened a few days ago.
If you feel there is a large deviation between the weather forecast and actual weather conditions, please submit feedback in the Weather APP.