What are the definitions of the highest and lowest temperatures in the weather forecast?

The temperature mentioned in the weather forecast refers to the air temperature measured in the open air without direct sunlight (usually measured by blinds). The highest temperature is the highest temperature in a day, generally appearing in14-15; The lowest temperature is the lowest temperature in a day, usually before sunrise. In meteorology, the physical quantity representing the degree of air heat and cold is called temperature, which is referred to as temperature for short. The international standard unit for temperature measurement is Celsius (℃).

The temperature mentioned in the weather forecast was measured on the thermometer in the louver box 1.5 meters above the ground of the observation site. Because the thermometer keeps good ventilation and avoids direct sunlight, it is representative. The difference of temperature is one of the main factors that cause the difference between natural landscape and our living environment, which is closely related to our life.

Temperature records can characterize the thermal characteristics of a place, which is indispensable in both theoretical research and the application of national defense and economic construction. Temperature is one of the conventional measurement elements in ground meteorological observation. The temperature has a fixed temperature (the basic station observes four times a day, and the four hours are 02, 08, 14 and 20 respectively; According to the actual situation, some stations observe three times a day, at 08: 00, 14 and 20: 00 respectively. Reference station observation 24 times a day), as well as the daily maximum and daily minimum temperature.

Usually, people use the numerical value of atmospheric temperature to reflect the degree of heat and cold of the atmosphere. China uses centigrade scale, which is expressed in℃ and pronounced as℃.

Extended data:

In addition to the daily average temperature, there are also waiting (5 days), ten-day (10 days), monthly and annual average temperatures. Express the changing characteristics of temperature in different periods. The meteorological department makes observations every six hours at 02: 00, 08: 00, 14: 00, 20: 00 (Beijing time) or 02: 05: 08, 1 14: 00, 20: 00 and 23: 00. For special needs (such as aviation), meteorological observations are even made at intervals of 1 hour and half an hour.

① Average temperature on a certain day: the average of the highest and lowest temperatures on a certain day.

② Monthly average temperature: the average of the average temperature for many days in a month.

(3) Average temperature in a certain year: the average of daily average temperature (or monthly average temperature) in a certain year.

References:

Baidu encyclopedia-temperature