The first month of 2026 is already finished and so it is a good time to check on some metrics for the month. The month featured the first half being rather mild and the second half being rather chilly, so perhaps the difference between the warmest high and coldest low for the month was exceptional? The featured chart presents the range between those values for each January on record for Sioux City. The warmest high for 2026 was 63°F and coldest low was -13°F, which makes for a range of 76°F. The panels show each year's max high (top), min low (middle) and range between the two (bottom). A simple period of record average is plotted for both along with a trailing 30 year average. The 2026 range was not very exceptional thanks to the minimum low being just about average.

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