Today is the winter solstice, when the daylight hours are the shortest for the year. Intuitively, one may expect this to be the coldest day of the year since it would have the least amount of sunshine. The featured map presents an analysis of the number of days after the solstice when the coldest day locally occurs. For Iowa, this works out being the middle of January. The east to west pattern over the United States is interesting as it takes a bit longer to cool the regions around the Great Lakes.

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Tags:   winter   temp