Summer-Like Mugginess: September 30, 2019

storm clouds
Storm clouds building west of the Twin Cities on the evening of September 30, 2019. Courtesy: Minnesota State Climatology Office.

Summer made a brief reappearance on the last day of September. High temperatures in the mid to upper 80s with dew point temperatures in the low 70s were common across southern Minnesota. The Twin Cities had a dew point temperature of 72 degrees for three hours during the afternoon of September 30. This is the highest dew point temperature seen so late in the year. The Twin Cities had a high temperature of 86, which just fell short of the record high of 87 for the date. Rochester set a record high of 89, breaking the old record of 86 set in 2002.

A cold front swept into the region during the evening, with a broken line of strong thunderstorms that were quite vigorous, but not severe. Colder and drier air moved in after the front passed, while the departing thunderstorms produced a brilliant light show after dusk to the east.

Modified October 1, 2019

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