Traditional Culture Encyclopedia - Weather inquiry - Why can the weather forecast predict 90 days?

Why can the weather forecast predict 90 days?

Forecast is the weather trend. Weather forecast The 90-day forecast is a long-term forecast that lasts for three months. It is a quarterly forecast, forecasting weather trends, such as total rainfall, extreme maximum temperature and minimum temperature in 90 days. It can predict 90 days, because it predicts the general trend rather than the specific weather every day. Weather refers to the atmospheric and meteorological conditions in a specific area in a short period of time.