The chilly start to September has been replaced by persistently mild temperatures without return to such chilly weather to speak of. For Ames, the low back on the 7th of September was 38°F with no values cooler since. The featured chart looks into the interval each fall season between the date of first sub 39°F to the date of first sub 32°F temperature for Ames. The dashed line provides a reference to associate the number of days with a given subsequent date. The linear fit line is an attempt to fit the two dates and the relatively poor correlation shows that having such a cool temperature does slightly increase the earliness of the second temperature, but not by much. Values shown around the 7th of September range from about a week to over 50 days!

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