How do humans predict the weather?

It is mainly the experience accumulated over a long period of time.

Short-term or long-term weather and temperature forecasts are based on the analysis of satellite cloud images and weather maps, combined with comprehensive research on relevant meteorological data, terrain and seasonal characteristics, and mass experience.

Modern science and technology is relatively developed, using the principles of dynamic meteorology, mathematical physics methods, statistics, etc., and high-speed electronic computers to solve simplified atmospheric fluid dynamics and thermodynamic equations, which improves the level of prediction. It is impossible to be completely precise.