Unlike race, ethnicity is determined primarily by

While race is more associated with biological traits, like your skin color, facial features, hair, etc., ethnicity is more about cultural identities and background. For example, you can be of Hispanic ethnicity and be of Caucasian race.

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!