With wind chill New Hampshire summit fell to minus 108 F, likely lowest recorded

Lotta gymnastics to hide the fact it's been lower.

"Reconstructing wind chill based on historic records at Mount Washington shows the wind chill also could have been at minus 108 F or below on Jan. 22, 1885. The low that day — which still stands as the record low— was minus 50 F and the 24-hour average wind speed was 89 mph, Brettschneider said. That combination would produce a wind chill below minus 108 F, he said."

"Would produce a windchill below...."

Not could or might. Would. It's a mathematical calculation that is only applicable to human skin anyway.