Des Moines hit 90 degrees for the first time this year on Tuesday. This was about four weeks earlier than long term average. The featured chart presents the average first date of the year for a given high temperature and the dates for just 2014. For some temperature thresholds, this year was earlier than average and for others later. Temperatures on Thursday will be cooler with chances of thunderstorms, some of them being severe.

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Tags:   highs