Extreme Cold/Wind Chill in Clayton, Iowa

Minimum wind chills across Clayton County ranged between 25 to 35 degrees on the morning of February 18th. The coldest wind chill in the county of 34 degrees below zero was reported in Monona, Iowa.

An arctic airmass moved into the Upper Mississippi River Valley on February 17th, bringing dangerously cold wind chills along with it. The coldest period was during the morning hours on February 18th where wind chills fell as low as 30 to 45 degrees below zero in some locations.