After a very humid start to September, drier and cooler air visited Iowa. The heat and humidity are set to return this week with dew point temperatures perhaps reaching the miserable 70 degrees again. The featured chart looks at the frequency of having such warm dew points during September for Des Moines. The frequency is expressed in number of hourly reports with such a reading. Of course the 2018 total is still in progress and already well above most other years since the early 1970s.

Voting:
Good = 9
Bad = 4