The formula to convert Fahrenheit to Celsius is:

°C = (°F - 32) / 1.8

Now, we can substitute 22 °F into the formula:

°C = (22 - 32) / 1.8

°C = -10 / 1.8

°C = -5.56

Therefore, 22 degrees Fahrenheit is approximately -5.56 degrees Celsius.