How is the temperature measured in the weather forecast? Is it the surface temperature or the average temperature within a certain height range, or is it obtained by other methods?

As far as temperature observation is concerned, in order to avoid the influence of ground and sun exposure and make the measured temperature representative and comparable, the thermometer must be placed in a louver box, and it should be at a distance of 1.5 meters from the ground, because the air change at this height is relatively stable, and it is also the height of human activities, which is more practical. The data of the thermometer in the shutter is the standard of daily temperature.

Why must the temperature be based on the temperature in the blinds? First of all, this standard is a unified international observation standard at present, and the data observed according to this standard should participate in the data exchange of the World Meteorological Organization. If the standards are not unified, the exchanged data will not be comparable, and the meteorological department will not be able to make accurate forecasts accordingly.

When the meteorological department issues a high-temperature warning signal, the highest temperature in the louver reaches above 35℃, which means that the highest temperature in other areas may reach 40℃ or even higher, which mainly depends on environmental conditions such as ground conditions, ventilation and direct sunlight. Therefore, the highest temperature in the observation field is more practical for the public. "