[Textide]

Terminal velocity will be a higher speed at higher altitudes due to the thinner air. At low altitudes, your figure is correct.

[Big Giant Head]

or a person in free fall, the terminal speed is about 60 m/s or 135 miles/hour. >

I would think that it would all depend on air density, which would include altitude and temperature. I don't think this one speed would be a consistent number.