What is 37.9 celsius in fahrenheit?

37.9 degrees Celsius is equivalent to 100.22 degrees Fahrenheit.

The formula to convert Celsius to Fahrenheit is: (Celsius × 9/5) + 32 = Fahrenheit.

So, (37.9 × 9/5) + 32 = 100.22°F.

This means that a temperature of 37.9 degrees Celsius is fairly warm, and would feel quite hot in Fahrenheit.