What is the relationship between temperature and barometric pressure, barometric pressure and weather trend, and what is the relationship between them? It's best to give an example

The level of air pressure and its changing trend are closely related to the future weather changes. In general, the obvious increase of air pressure means the strengthening of dry and cold air flow and the development of air sinking movement, which are not conducive to the formation of clouds and rainfall, so in this case, the weather is sunny; On the contrary, the obvious drop of air pressure means the strengthening of warm and humid air flow and the development of air upward movement. The strengthening of warm and humid airflow ensures the water vapor supply needed for precipitation, and the development of ascending motion provides the power needed for cloud formation and rainfall, which leads to precipitation and rainy weather. In the same place, the period when the low pressure rises to the highest value, that is, the period controlled by high pressure, is often the most obvious period when the air sinks, and the weather is fine. On the contrary, the period when the air pressure drops to the lowest value, that is, the period controlled by low pressure, is often the most obvious period when the air rises, and the weather is rainy. Of course, there are different situations when the air pressure rises and falls. When the air pressure is very high, a slight drop in air pressure is not necessarily a precursor to precipitation. On the contrary, when the air pressure is very low, a slight increase in air pressure may not be a sign of clearing up. In addition, the sharp rise and fall of air pressure is often a harbinger of rapid clearing or turning to rain, while the steady decline of air pressure often brings relatively mild precipitation. As for the unstable beating phenomenon when the air pressure drops, it often indicates the coming of severe weather such as thunderstorms.

Judging the weather change according to the air pressure, we must pay attention to whether the daily variation law of air pressure is destroyed. The daily variation of air pressure is normal in sunny days, but it is destroyed in rainy days. The change of sunny and rainy weather is influenced by many factors, and air pressure is only one of them, which may not explain the overall situation of weather change. The weather forecast based only on the change of air pressure may not be completely in line with the objective reality.