Illinois and Indiana Winter 2025–2026: La Niña to Bring Heavy Snow, Ice, and Prolonged Storm Cycles

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Illinois and Indiana Winter 2025–2026: La Niña to Bring Heavy Snow, Ice, and Prolonged Storm Cycles

CHICAGO, Ill. — Winter could arrive early and hit hard across Illinois and Indiana this year, as La Niña brings a stormier, wetter, and colder-than-usual season to the Midwest. Forecasters from NOAA’s Climate Prediction Center warn that conditions could settle in as early as September in northern counties, followed by a steady wave of snow and ice that lasts well into February 2026.

From Chicago to Indianapolis, the theme is simple and chilling:
“Chill, Snow, Repeat.”

La Niña’s Midwest Impact: Frequent Storms and Mixed Precipitation

La Niña is known to shift the jet stream and direct stronger storm systems across the Great Lakes and Midwest. This winter, that means:

Above-average snowfall in Chicago, Peoria, Indianapolis, and Fort Wayne

Higher chances of freezing rain and sleet across central regions

A relentless cycle of storms with little recovery time between events

The Farmers’ Almanac echoes NOAA’s warnings, describing the upcoming season as one of persistent cold and messy weather, especially in the central counties of both states.

Key Travel Corridors at Risk

With mixed precipitation and heavy snow expected, road and air travel may be frequently disrupted. Major routes expected to see winter hazards include:

I-55 through central Illinois

I-65 running through Indiana and into Chicago

Indiana Toll Road, especially during lake-effect snow events

Motorists should be ready for:

Icy roads and black ice in early mornings and evenings

Whiteout conditions during fast-moving snow squalls

Multi-vehicle pileups during major storm events

In the air, travelers using Chicago O’Hare, Midway, and Indianapolis International Airport may face flight delays or cancellations due to snow accumulation and freezing rain.

Schools and Power Grids Under Pressure

Prolonged winter weather could also cause:

School closures or delays due to icy roads and bus route risks

Power outages, especially in rural areas where ice storms may weigh down power lines and tree limbs

Increased demand for heating, fuel, and emergency services throughout the season

What Residents Should Do Now

With La Niña likely holding firm through February, residents across both states are urged to prepare early. Key steps include:

Winterizing vehicles and homes

Assembling emergency kits with food, batteries, and medicine

Installing backup heat sources or generators

Staying connected to local weather alerts and NOAA forecasts

Areas to Watch Closely

RegionMain Risk
Northern IllinoisEarly snowfall, lake-effect snow
Central IllinoisFreezing rain, icy roads
Northern IndianaHeavy snow, travel delays
Central/Southern IndianaIce storms, power outages

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