fever definition celsius
1 A fever in Celsius is a temperature greater than 38 degrees, or the equivalent of 100.4 degrees Fahrenheit. 2  Also, a temperature of 39 degrees Celsius/102 degrees Fahrenheit is not dangerous in and of itself, although it should prompt the individual to seek medical attention if it persists.elsius, or centigrade, is also a temperature scale that describes temperatures in Celsius degrees (C) and it is used in (almost) everywhere else outside the US. 212 F = 100 C = boiling point of water. 32 F = 0 C = freezing point of water. The conversion formulas between F and C are: [ C] = ([ F] - 32) 5/9.