On This Date in Iowa Weather History: Record August Cold

On August 20, 1950, unseasonably cool weather sent the temperature plummeting down to 30°F at Britt and Sibley, Iowa.  This tied the all-time coldest August temperature for Iowa, which previously occurred a full ten days later on the 30th (Elkader in 1893 and Mason City in 1915). At Des Moines the temperature reached 40°F on the 20th, tying the August record at that location. Other low temperatures around Iowa that morning included 31°F at Decorah, 32°F at Clarion and Saratoga, and 33°F at Atlantic, Inwood, Sheldon, and Waterloo. The majority of Iowa was 20 to 25 degrees below normal with respect to low temperatures.

Departure from Normal Minimum Temperatures on August 20, 1950.

Departure from Normal Minimum Temperatures on August 20, 1950.

Low temperatures on the morning of August 20, 1950. Image courtesy of Iowa Environmental Mesonet.

Low temperatures on the morning of August 20, 1950. Image courtesy of Iowa Environmental Mesonet.

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