The asthenosphere is a layer of the Earth's mantle that lies beneath the lithosphere. Its temperature is not uniform and varies with depth, but generally, it ranges from around 1,300°C (2,370°F) to 1,600°C (2,910°F).

Here's a breakdown:

* Upper Asthenosphere: The upper portion of the asthenosphere is closer to the lithosphere and has a temperature of approximately 1,300°C (2,370°F).

* Lower Asthenosphere: The lower portion of the asthenosphere is closer to the core and has a higher temperature, reaching around 1,600°C (2,910°F).

It's important to note that the exact temperature of the asthenosphere varies based on factors such as:

* Location: Different regions of the Earth have different temperatures.

* Depth: Temperature increases with depth.

* Geothermal gradients: The rate at which temperature increases with depth can vary.

The asthenosphere is a semi-molten layer that behaves like a very viscous fluid, allowing tectonic plates to move on its surface. This movement is driven by the heat from the Earth's core, which creates convection currents in the mantle.