The featured chart displays the range between the warmest high and coldest low for each August on record for Des Moines. The top panel displays the range between the two temperatures and the bottom panel shows the magnitude. The bar lines are the averages. It is kind of interesting to see that the recent year's August have almost all had below average range in temperature. Rewording, the range between the warmest high and coldest low is becoming less. One theory for this could be elevated humidity levels acting to keep overnight lows warmer and daytime highs cooler. The current forecast looks to continue the muted range with nothing too hot nor cold.

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