Average statewide temperatures: July 24: 99, July 23: 98.6 These two days toward the end of July 2012 are recorded as the ninth- and 10th-hottest days in Iowa … The U.S. historical temperature database contains 14.5 million observations from Oct 1 to Oct 25, and Potomac’s reading on Sunday morning was the coldest! The most recent winter when it was this cold, for this long, was in 2000-2001, when the daily statewide average was an even 30 degrees. These records were observed in Marion, a city next to Cedar Rapids and go back to 1893. The lowest temperature measured during that time was -33 degrees Fahrenheit (-36 Celsius) on January 16, 2009. Iowa isn't the only Midwest state to experience frigid winter temperatures. Coldest Temperature Ever Recorded in Iowa is -47 Degrees; The coldest weather temperature ever officially recorded in the state of Iowa is -47 degrees, which occurred on February 3, 1996, in Elkader, which is located about 125 miles northeast of Des Moines as the crow flies. Iowa's 9th coldest winter on record at an end Statewide average temperature over the past 90 days has been 14.7 degrees, well below the 22.1-degree normal That record low temperature for Iowa was recorded on February 3, 1996, in Elkander. The coldest weather temperature ever officially recorded in the state of Iowa is -47 degrees below zero. Temperatures plunged to minus-29.2 in Potomac, Montana, early Sunday — the coldest temperature ever observed this early in the season across the contiguous United States (the “Lower-48”). Along with Iowa, states such as Indiana, Missouri and Illinois had one of their top-10 coldest winters. This is nothing...The coldest temperature on record in the USA was -80 degrees set in Prospect Creek, Alaska, on Jan. 23, 1971, according to Weather Underground. Hottest temperature ever recorded: 118 F, Keokuk, southeast Iowa, 7/20/1934; Coldest temperature ever recorded: -47 F, Elkader. Coldest temperature for Iowa-47 degrees Fahrenheit Washta, Iowa January 12, 1912 Source: NOAA Website Convert this temperature to Kelvins and degrees Celsius. The record low temperature for Iowa was -47 degrees, recorded in Elkader on Feb. 3, 1996. * Elkander is a small 1,200 population city located in northeast Iowa along the Turkey River about 15 miles east of the Mississippi River and Wisconsin border. The coldest temperature ever recorded in Iowa was −47 °F on February 3, 1998. According to the National Oceanic and Climatic Data Center, the winter of 2013 through 2014 was the coldest ever recorded in some parts of the region. A date with a plus sign beside it means the lowest temperature also occurred on at least one other day earlier that year. * The record low temperature for Illinois was -36 degrees , recorded in Congerville on Jan. 5, 1999.