Relative Humidity
Definition
The ratio of actual water vapor in the air to the maximum amount it could hold at that temperature. 100% relative humidity means the air is saturated, and fog or clouds will form.
Why Relative Humidity Matters for Pilots
Weather concepts like Relative Humidity appear frequently on both FAA and EASA knowledge exams. More importantly, understanding Relative Humidity helps pilots make sound go/no-go decisions and avoid hazardous conditions in flight. Weather-related accidents remain a leading cause of general aviation incidents.
Exam Tip
This concept is commonly tested in meteorology-related questions on FAA and EASA exams. Make sure you can explain Relative Humidity in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
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