The featured chart presents three metrics for measuring how warm it has been since 1 July for Des Moines. The each sub-chart, blue bars represent a value below average and red bars represent a value above. The bottom chart shows the average difference between the heat index and the air temperature. For this year, the heat index added, on average, more than 4 degrees to the temperature. While this value is the largest shown, the highest air temperature was only 96 degrees and below the average seen in the past 38 years. This year's average temperatures comes in second behind 1983. The humidity has certainly made this year feel very hot compared to years past.

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Tags:   jul10   aug10