The second week of October is about the time much of Iowa expects to have seen its first fall temperature below 32 degrees Fahrenheit as shown by the featured chart plotting the 50th percentile date. The present forecast has temperatures at much warmer levels with 80 degree highs and rather muggy conditions for October along with a number of chances for rain and thunderstorms. The featured map is a bit noisy as metrics like this are often very sensitive to local micro-climate effects as nearby stations may have different siting and local topographies.

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