What is the standard temperature lapse rate per 1,000 feet?

The standard temperature lapse rate in the atmosphere is defined as the rate at which temperature decreases with an increase in altitude. Under standard atmospheric conditions, the average lapse rate is approximately 2 degrees Celsius per 1,000 feet of altitude gain. This rate is critical for pilots as it helps in understanding how the temperature varies with altitude, which can affect aircraft performance, particularly during takeoff, climb, and descent.

Understanding the standard lapse rate is also essential for flight planning, as it allows pilots to predict atmospheric behavior and prepare for related changes in aircraft performance metrics, such as lift and engine efficiency. Additionally, this lapse rate helps in locating the tropopause and understanding weather phenomena associated with temperature variations at different altitudes.