What is the standard atmospheric temperature at sea level?

The standard atmospheric temperature at sea level is 15 degrees Celsius. This value is part of the International Standard Atmosphere (ISA) model, which is utilized for various aviation-related calculations. The ISA is essential for pilots and flight planners because it provides a baseline for temperature, pressure, and density at sea level, which are critical parameters influencing aircraft performance, engine efficiency, and aerodynamic characteristics.

In aviation, understanding standard temperature is crucial for calculations related to altitude, density altitude, and the performance metrics of the aircraft. For example, if the temperature deviates from the standard value, it can significantly affect climb rates, takeoff distances, and fuel consumption. Therefore, knowing that the standard temperature at sea level is 15 degrees Celsius helps in making accurate assessments during flight planning and operations.