What is the approximate temperature of the mesopause at an elevation of 68 kilometers above sea level?

The mesopause, located at an altitude of about 68 kilometers (approximately 42 miles) above sea level, typically has temperatures around -90 degrees Celsius (-130 degrees Fahrenheit). This layer marks the transition between the mesosphere and the thermosphere, where temperatures begin to rise again. The extreme cold at the mesopause is due to the low density of air and the limited absorption of solar radiation at that altitude.