Why is the temperature in the weather forecast always written as, for example, 1~20℃ instead of 1℃~20℃?

Because it is more in line with people's daily habits, we can finally bring the same unit, otherwise it will look heavy.

Temperature article?

Temperature refers to the temperature of air. In China, the temperature is expressed in degrees Celsius (℃) in meteorology. Regarding the forecast of temperature, the most common expression "sunny, 5℃ to 20℃" means that the maximum temperature of such and such is 20℃ and the minimum temperature is 5℃ in the next 24 hours. ?

Daily maximum temperature refers to measuring the highest temperature reached by the ground atmosphere on that day; Similarly, the daily minimum temperature is the lowest temperature reached by the ground atmosphere on the day of measurement. ? The daily maximum and minimum temperatures may not be displayed on the hour. Generally speaking, the highest temperature in a day usually appears in 14 ~ 15, which is the hottest time of the day; The daily minimum temperature is generally before sunrise. ? In the weather forecast, we all have this experience, and the temperature is often different from the somatosensory temperature. The real reason is that we have been cheated by our feelings. ?

Predicting temperature is not the same as somatosensory temperature?

The temperature in the weather forecast refers to the temperature of the air in the louver at a height of 1.5 meters; Somatosensory temperature refers to the air temperature that the human body feels. Under the same temperature conditions, air humidity and wind speed will affect the sense of warmth and coldness of human body. ?

Humidity?

Usually, the temperature is relatively high and the humidity is relatively low, so the human body will not feel uncomfortable, because the water on the surface of the human body has evaporated and it feels very dry.

Wind speed? A certain wind speed will make people feel that the air is flowing and the heat emitted by the body is blown away from the body surface. Even if the temperature is high, it will still feel dry.

Radiation? The surface temperature is high, and the heat emitted to the outside is large. For example, the temperature of the concrete floor irradiated by the sun is very different from that of the cooler water body or wetland.

Sedimentation article?

Meteorology, precipitation is a complex concept. Rain, snow, hail, rain, frost, dew, fog and fog all belong to the category of precipitation. In the weather forecast, precipitation generally only refers to rainfall and snowfall, and of course it also includes precipitation stages such as sleet and rain-to-snow.

The weather forecast of rainfall (snow) is not determined by the forecaster's close feeling and imagination. In the weather forecast business, there are clear standards and norms for the level of precipitation.

How strong is "short-term heavy precipitation"? ? Rainfall (snow) divided by 12 or the sum of rainfall (snow) for 24 hours. In fact, the rain (snow) is seldom uninterrupted. In this way, isn't it unscientific to judge the precipitation level by 12 or 24-hour precipitation? ?

Considering this problem, the meteorological department introduced the concepts of "array precipitation" and "short-term heavy precipitation". ? Array precipitation? Formative precipitation refers to precipitation with short (sudden) precipitation time and sudden start and end time, which is divided into showers and snow showers. Formation sedimentation is generally independent of grade. ?

Short-term heavy precipitation? When the array precipitation intensity is strong, 1 hour precipitation exceeds 20 mm, it is called short-term heavy precipitation. Short-term heavy precipitation belongs to the category of strong convective weather.