Here's how to convert 20.5 degrees Celsius to Fahrenheit:

Formula:

* °F = (°C × 9/5) + 32

Calculation:

* °F = (20.5 × 9/5) + 32

* °F = (36.9) + 32

* °F = 68.9

Therefore, 20.5 degrees Celsius is equal to 68.9 degrees Fahrenheit.