Chicago, Illinois – Temperatures will surge across Illinois and Kentucky by Friday afternoon, climbing 10 to 15 degrees above normal and bringing early-season warmth with increasing thunderstorm potential.
According to the National Weather Service Climate Prediction Center, there is a 70 to 80 percent probability of above-normal temperatures across the region through early next week. Central and southern Illinois, along with western and central Kentucky, including Chicago, Springfield, Paducah, and Louisville, are in a favorable zone for sustained warmth.
Chicago is expected to reach near 80 degrees by Saturday between 2 p.m. and 6 p.m., with similar warmth extending south along I-55 and I-57. Louisville could climb into the low to mid-80s, while areas along I-64 and I-24 warm quickly under partly sunny skies.
By late afternoon into the evening, increasing Gulf moisture will trigger scattered showers and thunderstorms across both states. Storms may produce brief heavy rain, lightning, and wind gusts over 40 mph, especially along I-64, I-57, and I-65, potentially impacting travel and outdoor plans.
Residents should stay hydrated, remain alert for changing weather conditions during the evening hours, and prepare for brief disruptions during peak travel times. This pattern will persist through the weekend into early next week, with additional advisories likely as heat and storm chances continue.
