The featured chart compares daily high and low temperatures between Spencer (NW Iowa) and Burlington (far SE Iowa) for 2022. When the high or low at Spencer was warmer than Burlington, the bar appears in red. This chart nicely illustrates a couple of aspects of Iowa's climate. For high temperature, Burlington is often warmer during the non-summer months, but then often cooler during the warm half of the year. This is explained by Spencer being closer to a high plains type climate that features stronger atmospheric mixing and lower humidity which help to raise temperatures during the daytime summer season. The opposite is true during the night time as lower humidity allows more overnight cooling and you can thus see much fewer occasions that Spencer has a warmer low temperature regardless of the season.

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