Springfield, IL – Illinois may be in for a snowier winter than recent years, with the 2025-26 Winter Weather Outlook suggesting the state faces a heightened risk of heavy snow events and stronger storms from December through February.
According to the National Weather Service (NWS) Climate Prediction Center, weak La Niña conditions are developing this fall and expected to transition to a neutral phase by mid-winter. Historically, La Niña winters often bring colder-than-average air and more active storm tracks across the Midwest, increasing the potential for snowier conditions throughout Illinois.
Meteorologists caution that while long-range forecasts provide valuable guidance, this year’s prediction carries uncertainty. Short-term climate factors such as the Arctic Oscillation (AO) and Madden-Julian Oscillation (MJO) can cause rapid shifts in storm intensity and timing. These patterns may swing Illinois from quiet stretches to sudden bouts of heavy snow.
Still, the risk of above-average snowfall is notable. Northern Illinois, including Chicago and Rockford, could see significant snow totals, particularly when lake-effect snow enhances storm systems off Lake Michigan. Central Illinois cities such as Peoria, Bloomington, and Springfield may face multiple moderate to heavy snowstorms, while southern regions including Carbondale could see a greater mix of snow, sleet, and ice.
Past winters with similar conditions highlight the wide range of possibilities. Illinois has seen seasons with fewer than 25 inches of snow statewide and others topping 60 inches in northern counties. This variability underscores why officials urge residents to prepare, regardless of the final outcome.
Travel is expected to be one of the biggest concerns. Major interstate routes such as I-55, I-57, I-70, and I-90/94 often see the heaviest disruptions during snowstorms. Commuters in Chicago and travelers across the state should prepare for potential closures, flight delays, and difficult road conditions. January and February historically bring the strongest storm systems.
The official NWS winter forecast will be issued October 16, but preparedness efforts should start now. Emergency officials recommend checking heating systems, stocking up on salt and shovels, and ensuring vehicles are winter-ready with emergency kits, blankets, and food.
