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Chicago Grapples with Chilly Inversion Layer; Warmer, Sunny Weekend in Sight

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Published on November 20, 2025
Chicago Grapples with Chilly Inversion Layer; Warmer, Sunny Weekend in SightSource: X/NWS Chicago

Chicago's weather remains locked under a layer called an inversion, maintaining cold and gloomy conditions that have settled over the city for days, FOX 32 Chicago reports. This meteorological occurrence, where warmer air traps clouds and moisture at lower levels, is challenging to disrupt this time of the year. As reported by the National Weather Service, this results in persistent cloudiness, patchy drizzle, and fog series that keep the thermostat hovering around the mid-40s.

The NWS forecast includes drizzle before 9 pm tonight with an overnight low resting at 45 degrees; the south-southwest winds will shift northwest post-midnight, and despite the incessant cloud cover, a storm system is expected to miss the Chicago area to the south. Moving into Friday, there's a slight 20 percent chance of rain past noon, and though the clouds persist, temperatures will edge slightly higher with a high nearing 51 degrees, and winds will blow from the north between 5 to 10 mph.

Temperatures are pinned down by the overcast skies with highs in the upper 40s, struggling to break through to more desirable conditions. According to FOX 32 Chicago, the chances for rain are slim tomorrow, mainly toward the evening and isolated in the far-southern regions of the area, with temperatures similar, floating up towards the 50-degree mark.

The weekend forecast from the National Weather Service offers a reprieve as Chicagoans can anticipate mostly sunny weather by Saturday, facilitating a modest climb in temperature, a high near 49 degrees is anticipated; Sunday shines brighter with an expected peak at 56 degrees, causing the permadrab to lose its grip on the city skyline at least for a brief while. The beginning of next week, however, loops back to unsettled patterns, with the next rain probability introducing itself Monday night, extending into Tuesday, fluctuating highs remaining in the 50s as the city wrestles with the capricious whims of fall.