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Thermospheric temperatures increase with altitude due to absorption of highly energetic solar radiation. Temperatures are highly dependent on solar activity, and can rise to 2,000 °C (3,630 °F) or more.
The thermosphere is typically about 200° C (360° F) hotter in the daytime than at night, and roughly 500° C (900° F) hotter when the Sun is very active than at other times. Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.
While still extremely thin, the gases of the thermosphere become increasingly denser as one descends toward the Earth. As such, incoming high energy ultraviolet and x-ray radiation from the sun begins to be absorbed by the molecules in this layer and causes a large temperature increase.
The thermosphere lies between the exosphere and the mesosphere. “Thermo” means heat, and the temperature in this layer can reach up to 4,500 degrees Fahrenheit. If you were to hang out in the thermosphere, though, you would be very cold because there aren’t enough gas molecules to transfer the heat to you.
High-energy X-rays and UV radiation from the Sun are absorbed in the thermosphere, raising its temperature to hundreds or at times thousands of degrees. However, the air in this layer is so thin that it would feel freezing cold to us!
They can reach temperatures up to 1800°F (980°C); however, since this layer is practically a vacuum with few atoms and molecules, this stored kinetic energy rarely gets converted to thermal or heat energy. As a result, the temperature remains freezing, close to an absolute zero.
Solar activity strongly influences temperature in the thermosphere. The thermosphere is typically about 200° C (360° F) hotter in the daytime than at night, and roughly 500° C (900° F) hotter when the Sun is very active than at other times.
The 5 layers of the atmosphere are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. There are five layers of the atmosphere and several secondary layers. The dividing points between these layers are altitude and temperature.
The thermosphere is the highest section of the Earth's atmosphere. It starts about 53 miles above sea level and extends to between 311 to 621 miles. The range of thermosphere temperature is surprisingly hot -- between 932-3,632° F.
What is the temperature in the thermosphere? The sun strikes the thermosphere first causing air to be very hot. This is why the thermosphere can reach temperatures up to 2000°C or more.