Exactly. They likely didn't have enough data, because a)it doesn't actually get that cold for very long, even in the coldest parts of the US and b)there aren't

Exactly. They likely didn't have enough data, because a)it doesn't actually get that cold for very long, even in the coldest parts of the US and b)there aren't many people in those locations (North Dakota, grandparent comment's home state, has the same population as Boston, Massachusetts. Not the region - just the city itself) and c)there aren't many EVs, either - due to lack of infrastructure for them, lower income levels, and (drumroll please) their lower ranges. Contrary to the knee jerk reaction some people seem to be having, this isn't an conspiratorial attempt to pull the wool over the eyes of Real Americans(TM). I don't understand the reaction, anyway - ICE vehicles plunge in range with cold temperatures too, and there are a bunch of reasons why EVs seem well-suited to rural life. The range reduction doesn't mean squat when the longest average commute in the US - Maine - is 10 miles. Who cares if your 300-350 mile EV only gets 200 miles, when that's still 20 days of commuting, and every hour your car is in your garage, it's "gassing up" with no intervention on your part beyond a few seconds to plug in a cord when you get home? FYI, looking at a smattering of temperature charts, "much colder than 20 degrees for extended periods" is a slight exaggeration for Minnesota.