Plain English Meaning

Weather that is still good enough for flying by visual reference, but only just. The clouds are lower or visibility is poorer than ideal, so a non-instrument-rated pilot should think carefully before going.

Full Definition

A category of flight conditions used on weather depiction and graphical aviation weather products in which the ceiling is between 1,000 and 3,000 feet above ground level, and/or visibility is between 3 and 5 statute miles inclusive. MVFR conditions are legal for VFR flight in most airspace but are close enough to instrument conditions that they require additional caution. On , MVFR are shown shaded in blue.