The featured chart displays the coldest daily low temperature for the period between 1 December and 7 January each year. For Des Moines this year, that value is a balmy 12 degrees. The chart shows that this is the warmest such temperature on record for the period. The average coldest temperature for the period is 19 degrees colder at -7 degrees. The forecast finally has our first major shot of cold artic air arriving this weekend.

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