Here's how to convert 31 degrees Celsius to Fahrenheit:

Formula:

* F = (C x 9/5) + 32

Where:

* F = Fahrenheit

* C = Celsius

Calculation:

1. Multiply Celsius by 9/5: 31 x 9/5 = 55.8

2. Add 32: 55.8 + 32 = 87.8

Therefore, 31 degrees Celsius is equal to 87.8 degrees Fahrenheit.