Finnish word fahrenheitaste comes from Finnish aste, Finnish Fahrenheit

Detailed word origin of fahrenheitaste

Dictionary entry	Language	Definition
aste	Finnish (fin)	(everyday usage) degree, degree Celsius (short for celsiusaste). Degree. Grade. Order.
Fahrenheit	Finnish (fin)
fahrenheitaste	Finnish (fin)	Degree Fahrenheit (one degree on the Fahrenheit temperature scale).