Heat and humidity returned to Iowa on Thursday with most of the state experiencing dew point temperatures in the lower 70s. The featured chart presents the number of days per year that at least two ASOS sites in the state report a 70+ dew point on the same day prior to 18 June. This year has already seen 13 days, which is the second highest total since 1973. Another uncomfortable day is in store for today.

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Tags:   dewpoint   2010