Chicago, IL – Residents across northern Illinois woke up to a sharp blast of Arctic cold Monday morning as temperatures dipped below zero in parts of the region, marking the coldest morning in more than a month.
According to the National Weather Service Chicago, Rockford Airport bottomed out at -3 degrees after sunrise at 10:36 a.m. CST Monday, while Chicago O’Hare International Airport recorded a low of -1 degree. Officials said this marks the first sub-zero temperatures observed at both climate sites since December 14, when Rockford reached -6 degrees and O’Hare dropped to -2 degrees.
The cold snap follows several days of seasonably cool weather, but Monday’s readings signal a renewed push of Arctic air into northern Illinois. Wind chills early Monday morning made conditions feel even colder for commuters, outdoor workers, and students heading to school.
Weather officials warn that prolonged exposure to sub-zero temperatures can increase the risk of frostbite and hypothermia, especially for those without adequate winter clothing. Drivers may also notice sluggish vehicle starts as extreme cold affects batteries and engines.
Temperatures are expected to remain below average through the start of the week, with gradual moderation possible later in the week. However, residents are urged to continue taking cold-weather precautions, including limiting time outdoors, dressing in layers, and checking on vulnerable neighbors.
Those traveling through Winnebago County, Cook County, and the greater Chicago metro area should also allow extra time for morning commutes, as cold conditions can worsen icy patches on untreated roads.
For the latest forecasts and safety updates, residents are encouraged to monitor advisories from the National Weather Service.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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