When is the Coldest Day of the Year?

The coldest day of the year on average occurs at least a month earlier on the western seaboard than it does on the eastern seaboard of the United States.According to NOAA's Coldest Day of the Year interactive map the further west you are in the United States then the more likely you are to have already experienced the coldest day of the year.NOAA's Coldest Day of the Year map uses 30 years of