Nudorthodes variabilis is a moth in the family Noctuidae first described by William Barnes and James Halliday McDunnough in 1912.

The forewing ground color is usually even gray brown, sometimes with a slight reddish tint.

The medial line is usually prominent, extending obliquely from the costa to the reniform spot and as a straight line from there to the hind margin.

The lower third of the reniform spot is filled with a well-defined dark blue-gray patch.

Adults have been recorded on wing from late August to mid-September.