Density altitude is influenced by temperature, altitude, humidity, and wind, degrading the aircraft’s performance. As the temperature rises during June, July, and August, flying to destinations with high-altitude can be negatively affected.
Planes work harder to perform in hot weather conditions. Adding high density in the mix will rob the engine of power and the wings of lift. Cold air is denser, making it easier for aircraft engines to develop horsepower. Since hot, humid air is less dense, the aircraft will require longer distances for takeoff and landing than it would on a cool day.