Your location in the state on Sunday made a big difference for your afternoon temperatures. Western Iowa was able to reach well into the 80s while eastern Iowa was struggling to get out of the 60s. For example, Sioux City reached 86 degrees for an afternoon high while the Quad Cities (Davenport Municipal) only reached 69. Are such large differences in temperature common? The featured chart presents a heatmap of the daily difference in afternoon high temperature between the two sites. The chart shows a lot of spread during all times of the year with Quad Cities slightly colder on-average than Sioux City. This temperature difference may appear somewhat surprising given that Quad Cities is further south, but Sioux City is closer to a High Plains climate environment that is able to warm more efficiently.

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