Visual Meteorological Conditions (VMC) is a term used in aviation to describe weather conditions that allow pilots to fly an aircraft using visual flight rules (VFR) . VMC is the opposite of instrument meteorological conditions (IMC), which require pilots to use instruments to navigate the aircraft. VMC is defined by the International Civil Aviation Organization (ICAO) as meteorological conditions expressed in terms of visibility, distance from cloud, and ceiling equal to or better than specified minima. The exact requirements for VMC vary depending on the type of airspace, whether it is day or night, and from country to country. However, the typical visibility requirements vary from one statute mile to five statute miles, and the cloud clearance requirements vary from merely remaining clear of clouds to remaining at least one mile away from clouds horizontally and 1,000 feet away from clouds vertically.

It is important to note that VMC has another meaning in aviation, which is Minimum Control Speed (Vmc). Vmc is the calibrated airspeed at which a multi-engine aircraft should fly when there is a loss of a critical engine. It is the speed at which the rudder no longer has the authority to overcome the yaw caused by the critical engine being inoperative, under specific criteria mandated by the FAA. The published Vmc (in the POH or the red line on the airspeed indicator) is based on the specific conditions and criteria mandated by the FAA, whereas actual Vmc will vary based on the actual conditions during the engine failure.