Why is the temperature difference between today and tomorrow so big?

Air flow influence. Airflow is an academic term in meteorology. Especially the vertical movement of air. The flow of air (wind). Its speed is expressed in meters per second (m/s). The reason of air flow is the temperature difference caused by uneven heating. Hot air rises slightly, supplemented by cold air flow, forming convection. Due to the influence of airflow, the temperature will drop rapidly.