Frigidaria is one of the more poorly marked of the grey-brown Scopula species in Alberta. They are small (1.8-2.6 cm wingspan) light grey-brown moths, heavily dusted with darker brown scales. Markings are more or less confined to narrow poorly defined antemedian, median and somewhat better defined postmedian lines. The postmedian line bulges slightly outward midway across the hindwings. Discal dots are absent or nearly obsolete. The collar and frons are partially clothed with white scales, a character that will separate it from similar S. inductata. Male and female genitalia are described and illustrated by McGuffin (1967).