IEM Daily Feature
Friday, 15 September 2023

Last Fall Dates

Posted: 15 Sep 2023 05:30 AM

Yesterday's Daily Feature presented the frequency of having observed a given low temperature by a fall season date. Today's plot shows the opposite with the frequency of having observed the last high temperature of a given threshold by the fall season date. For example, about 50% of the years observed the last day of at least a 85 degree high temperature by today. Or rewording, only about 50% of years on record experienced a 85+ degree high temperature later than today's date. It is interesting to note the relative distance between the 85, 80, and 75 degree lines. Certainly reaching 85 degrees is a bit more difficult this time of year than making it to 80. The right hand table shows the percentile dates along with the min and max dates. You may recall that 15 December 2021 (ob taken 7AM on 16th) event shown as the last 70 degree day when crazy warmth and a serial Derecho impacted the state!

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Tags:   fall