You Won't Believe The Most Extreme Temperature Ever Recorded In Illinois
By Logan DeLoye
July 16, 2025
Throughout history, extreme temperatures have captured human attention for their dramatic impact on both the environment and society.
In every state, records of the most intense heat or cold serve as benchmarks of nature’s extremes, often reflecting the unique conditions of the region. These temperature milestones are not just meteorological curiosities, they affect agriculture, infrastructure, and daily life.
While these events may be rare, their consequences can be lasting, prompting emergency planning. The dramatic increase in temperature often occurs during extraordinary weather events influenced by global and regional weather patterns. Regardless of what caused them, these record-breaking moments stand out as reminders of Mother Nature's power. Understanding when and how these extremes occur helps us better prepare for future events in an era of ever-changing climate patterns.
According to an updated list compiled by Stacker, the most extreme temperature ever recorded in Illinois was 117 degrees in East St. Louis in 1954, and -38 degrees in Mt Carroll in 2019.
Here's what Stacker had to say about the most extreme temperature ever recorded in Illinois:
"East St. Louis recorded the state's most sweltering temperature on July 14, 1954. While the residents of East St. Louis first woke up to stifling 100-degree heat, the temperature soared to 117 degrees by late afternoon. Residents in St. Louis recalled July 14, 1954, as the day "they were just cooked."
Check out Stacker for a complete list of record-breaking high and low temps in each state.