the degree to which the climate of a region typifies that of the interior of a large landmass.
Origin of continentality
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
1897, a term in meteorology, from German kontinentalität (1895), from Latin continentem (see continent (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper