Weather
Chicago, IL Weather Oct. 26-30: Fog Tonight, Rain by Friday
Chicago, IL – Northern Illinois residents can expect an unusually mild stretch of late October weather this week, with afternoon temperatures potentially approaching 80 degrees before occasional rain
By Lena Wood · 2026-10-26T19:55:55.408Z
Chicago, IL – Northern Illinois residents can expect an unusually mild stretch of late October weather this week, with afternoon temperatures potentially approaching 80 degrees before occasional rain showers return to the Chicago area.
According to the National Weather Service in Chicago, a generally quiet weather pattern will continue through Friday, Oct. 30, with intermittent opportunities for rain beginning around midweek. Forecasters emphasize that widespread, all day rainfall is not expected.
Monday night, Oct. 26, could bring fog to portions of the region, with overnight temperatures falling between 44 and 51 degrees. Drivers should remain alert for reduced visibility where fog develops.
Tuesday is expected to bring partly cloudy conditions and highs ranging from 64 to 76 degrees, with the warmest readings south of Interstate 80. Overnight lows should range from 49 to 55 degrees.
By Wednesday, temperatures are forecast to reach 71 to 75 degrees, followed by overnight lows between 54 and 57 degrees.
Thursday could be the warmest day of the forecast period, with highs reaching 72 to 79 degrees across the region. Overnight temperatures are expected to fall between 47 and 56 degrees.
Friday will remain relatively mild, with highs between 67 and 77 degrees and another opportunity for scattered rain showers. Overnight lows are forecast between 53 and 56 degrees.
The changing conditions could affect outdoor activities and travel plans across Chicago, Cook County and surrounding northeastern Illinois communities.
Despite the occasional showers, forecasters say the overall weather pattern should remain relatively tranquil, with no widespread washout anticipated.
Residents planning outdoor activities should monitor updated forecasts as the timing and coverage of showers become clearer.
For location specific forecasts, visit weather.gov/chicago .