Midwest, Great Lakes Winter 2025: La Niña May Bring Early Snow by September from Ohio to Montana

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CHICAGO – The Upper Midwest and Great Lakes could be in for an early taste of winter, with snow possible as soon as September as a strengthening La Niña pattern takes hold. Federal forecasters say the season ahead points to above-average precipitation across northern Illinois, Wisconsin, Michigan, and parts of Indiana, raising the potential for frequent snowstorms and prolonged cold.

According to NOAA’s Climate Prediction Center, La Niña conditions will dominate the December-through-February period, shifting the storm track directly over the Great Lakes. That setup often fuels lake-effect snow events from Milwaukee to Cleveland and boosts overall storm intensity across the region. The Farmers’ Almanac warns residents to brace for a season defined by “Chill, Snow, Repeat,” with repeated cold snaps and storm systems expected.

Travel may become hazardous sooner than normal, with the possibility of slick conditions on major corridors including I-90, I-94, and I-75 as early-season systems pass through. Utility crews across Michigan and northern Indiana are also preparing for heavier ice loads on power lines and an uptick in outages during peak storms.

The threat of snow and ice could extend well into February, keeping much of the Great Lakes locked in a wet, stormy pattern deep into winter.

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