The equator and the poles have different latitudes, so do the heat received from the sun. There are many equatorial regions and few equatorial regions. So from the temperature point of view, the equatorial region is high and the poles are low. The air in the equatorial region is heated, and the water vapor is easy to condense to form precipitation; When the poles are cold and the airflow sinks, it is difficult to form precipitation. So from low latitude to high latitude, the temperature gradually decreases. Judging from the precipitation, the equator is rainy. The precipitation in the middle and high latitudes is influenced by other factors.

Sea-land factor

The land and the ocean have different heating characteristics, and the land absorbs and releases heat faster than the ocean, so the land temperature at the same latitude is higher than the ocean in summer and lower than the ocean in winter, and the temperature in coastal areas has maritime characteristics. In addition, there is more precipitation in coastal areas where the water vapor evaporated from seawater can easily reach than in inland areas.

topographic factor

From the point of view of precipitation, the windward slope forces the air to rise, because water vapor condenses when it meets cold, forming precipitation. Therefore, the precipitation on windward slope is more than that on leeward slope. At the same time, the terrain also has an influence on the temperature. As the height increases, the temperature decreases.