Hmm: Is this warmist study telling us that Minnesota actually cooled .2 degrees from 1912 to 1970, a 58-year period where CO2 was increasing?

And wait a minute:  Looking at the national numbers in the paragraph below, are they telling us that the US cooled .4 degrees from 1912 to 1970?

Minnesota warming trend gains steam | StarTribune.com

The Climate Central study, using readily available daily temperature data, looked at two periods: from 1912-2011 and 1970-2011. It determined that Minnesota's average daily temperature rose 2.5 degrees since 1970, compared with 1.7 degrees nationally. From 1912 to 2011, Minnesota's average increased 2.3 degrees, ninth among the states and well ahead of the national rise of 1.3 degrees.