The temperature inside a clothes dryer varies depending on the setting; low heat is approximately 125 degrees Fahrenheit, while medium heat and high heat are approximately 135 degrees Fahrenheit, according to GE. But the temperature is affected by several factors.
Load size and dampness can have an impact on the internal temperature. These factors can change the way the air flows through the dryer drum. Room temperature is also a factor because the dryer pulls air in from the room. Restricted air flow can affect the temperature too. Excessive lint and long vents can restrict the air flow, causing the temperature to rise. When that happens, the internal thermostat turns the heat source off until the dryer temperature is at a safe temperature again.