Temperatures were again very pleasant for late September on Thursday with highs well into the 70s. This September has seen plenty of hours with the temperature at or above 70 as shown by the featured chart for Des Moines. The top panel shows the number of hours for the month based on hourly observations and the bottom panel shows the frequency that a given hour for the month was at 70+ degrees. It is interesting to see the largest three values happening over the past three years since 1973. Of course, there is still time for the 70s total for this September to further accumulate with highs expected in the low 70s for both days.

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