How often does the Chicago area experience identical high and low temperatures?

Dear Tom,
Have there ever been several days in a row in the Chicagoland area where the high and low temperature was the same as the previous day or days, and if so how many?
Ricardo Mauzer, Huntley
Dear Ricardo,
A search through Chicago’s temperature records from 1871 to the present indicates 303 pairs of days with identical high and low temperatures, or an average of two occurrences per year. A search for three consecutive days with identical maximums and minimums yielded four events: Aug. 11-13, 1879, each day with highs/lows of 82/65 degrees; Aug. 26-28, 1882, 74/70; Sept. 5-7, 1910, 81/68; and, most recently, Nov. 22-24, 1920, 42/37. Four consecutive days of identical temperatures has never occurred

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.