What is the longest consecutive run of days in which the recorded high and low temperatures in Chicago have remained unchanged?
Scott R. Williams,
The answer is three. Identical day-to-day high/low temperatures are rare in Chicago, a testament to the city’s vigorous and changeable climate. Dating back to 1871, there have been only four instances of identical temperatures for three straight days- August 11-13, 1879 (82/65), August 26-28, 1882 (74/70), September 5-7, 1910 (81/68) and November 22-24, 1920 (42/37). Back-to-back occurrences of identical temperatures happen with a greater frequency with 298 instances, about two each year- most recently high/lows of 82/61 on August 4-5, 2015.