In a year, the temperature in the northern hemisphere and the northern hemisphere is the highest, and the temperature in Chinese mainland is the lowest.

In a year, the average temperature in the northern hemisphere and the northern hemisphere is the highest in July and the lowest in 1 month. The change of temperature lags behind the annual change of solar radiation, and the temperature rise mainly absorbs ground radiation, so it takes a process to store heat on the ground.

In the northern hemisphere, the average temperature is the highest in August and the lowest in February. The specific heat capacity of the ocean is relatively large, the absorption and release of heat by seawater are relatively slow, and the temperature change of ocean water is also relatively slow.