Weather
Midwest Halloween Weather: Warmer, Rain Risk Oct. 27–31 Illinois-Wisconsin
Chicago, IL – Halloween celebrations across the Midwest could feature warmer than normal temperatures, but increasing rainfall chances may complicate outdoor plans as Saturday, October 31, approaches.
By Nolan Pierce · 2026-10-22T09:34:11.269Z
Chicago, IL – Halloween celebrations across the Midwest could feature warmer than normal temperatures, but increasing rainfall chances may complicate outdoor plans as Saturday, October 31, approaches. Families preparing for trick or treating, costume parties and neighborhood festivals should watch for changing conditions during the final days of October.
According to the National Oceanic and Atmospheric Administration's Climate Prediction Center, the October 27–31 outlook favors above normal temperatures across much of the Midwest, while above normal precipitation becomes increasingly favored across western portions of the region.
Warmer Weather Expected Across the Midwest
Illinois, Iowa, Missouri, Wisconsin, Minnesota and surrounding states generally show a warmer than average temperature signal during the five day period.
Chicago, Milwaukee, Des Moines, Minneapolis, St. Louis and Kansas City could experience milder late October conditions.
The warmer pattern may make afternoon Halloween activities more comfortable, although temperatures could still fall considerably after sunset.
Rain Chances Increase Across Western Areas
The precipitation outlook reveals a west to east difference.
Iowa, Missouri and portions of Minnesota are closer to areas favoring above normal precipitation, suggesting a greater possibility of unsettled weather during October 27–31.
Farther east, including Chicago, Milwaukee and portions of Illinois and Wisconsin, precipitation expectations are closer to normal.
This means the potential for wetter conditions is more pronounced across the western Midwest than around the Great Lakes.
Will Halloween Night Stay Dry?
With Halloween falling on Saturday, rain timing could become an important concern for families planning evening activities.
However, the extended outlook does not determine whether showers will occur specifically during trick or treating hours.
Communities across Iowa and Missouri may want to monitor the developing precipitation pattern particularly closely.
For now, warmer than normal temperatures appear favored across much of the Midwest, while rainfall concerns increase toward the western portion of the region.
Updated daily forecasts will provide a clearer picture of Halloween night conditions as October 31 approaches