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.