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.