Definition
Weather conditions in which visibility, distance from clouds, and ceiling meet or exceed the minimums specified for flight under Visual Flight Rules (VFR). When VMC exist, pilots may operate by reference to what they can see outside the aircraft rather than by sole reference to instruments.
Plain English
Weather that is good enough to fly by looking out the window. The sky is clear enough, and you can see far enough, that you do not need to rely on your instruments to know where you are or what is around you.
Context Anchor
Seen in weather briefings, flight planning, air traffic control clearances, and discussions comparing visual and instrument flying conditions.
Derivation
Visual refers to seeing with the eyes. Meteorological comes from the Greek meteoron, meaning something high in the air, and is the root of meteorology, the study of weather. Together the phrase means weather conditions good enough to fly by sight.
Why Pilots Care
Determines whether a pilot may conduct flight under visual flight rules without an instrument rating or in IMC-prohibited airspace.
Grounding Statement
If the air is clear enough and the clouds are far enough away for the rules being used, the flight is in Visual Meteorological Conditions.
Intuition Check
Visual Meteorological Conditions does not simply mean “I can see something outside.” It means the reported or observed weather meets specific minimums for visibility and cloud clearance.
Example Sentence 1
The forecast showed VMC along the entire route, so the student planned a VFR cross-country.
Example Sentence 2
When visual meteorological conditions deteriorated to below VFR minima, the flight was cancelled.