Why do different websites find different weather forecasts?

This is very clear, we know: we are different when watching TV? If you watch your local TV station, then watch the weather forecast of this TV station, and then watch the weather forecast of other TV stations, there must be a difference.

Comrade, if you want to get the latest weather forecast, you should listen to the weather forecast of China Central Broadcasting Station, but you should also consider it carefully. Although CCTV's weather forecast center has advanced facilities, their forecasts are all national, referring to a wide range of weather conditions, and small places are not standard. So I suggest you watch the weather forecast broadcast by the municipal or provincial weather forecast meteorological station.