网页What is 37.9 Celsius in Fahrenheit? How hot is 37.9 degrees Celsius? Translate 37.9° from C to F. Degrees. From. To. Calculate. swap units ↺. 37.9 °Celsius = 100.22 °Fahrenheit. exact result. About. Celsius, or centigrade, is used to measure temperatures in most of the world. Water freezes at 0° Celsius and boils at 100° Celsius.