What's the difference between Celsius and Fahrenheit in the weather forecast?

(1) Fahrenheit scale 17 14 A glass mercury thermometer with mercury as the temperature measuring medium was made in Fahrenheit, Germany. The temperature of the mixture of ammonium chloride and ice water is chosen as the zero degree of thermometer, and the human body temperature is 100 degrees. Mercury thermometers are classified according to the volume expansion distance of mercury from 0 degree to 100 degree. According to the Fahrenheit scale, the freezing point of water is 32 degrees Fahrenheit and the boiling point is 2 12 degrees Fahrenheit. (2) Celsius Scale 1740 Swedish Celsius proposes that the freezing point of water at standard atmospheric pressure should be 0 degrees and the boiling point of water should be 100 degrees. According to the two fixed temperature points of water, glass mercury thermometers are graded. Intercropping between two points is divided into 100 equal parts, and each part is called 1 Celsius. Record as 1℃. The relationship between Celsius and Fahrenheit is t =1.8t℃+32.