37.9 °C = 100.22 °F
Is 37.9 °C normal body temperature or fever?
Normal body temperature is different between kids and adults.
Recent studies show that the baseline body temperature for adults is close to 98.2 F (36.78°C). A typical adult’s body temperature is between 97 F (36.11°C) and 99 F (37.22°C). The range of body temperatures for babies and kids is higher: 97.9 F (36.61°C) – 100.4 F(40°C).