Chicago Forecast: Sunny Sunday Before Rain Potentials Emerge Early Week

Jordan Whitfield

October 25, 2025

2
Min Read

CHICAGO, IL — Before dawn on Saturday, the skyline glowed beneath a crisp, cloudless sky, with late-October cool drifting off Lake Michigan. The quiet vibe won’t stick around, though. A wetter, breezier pattern is set to edge in by midweek as temperatures ease into a late-fall trend.

Meteorologists at the National Weather Service in Chicago expect a dry, mild weekend. Saturday will top out in the low 50s, with only a slight chance of a few sprinkles before midday. Sunday turns bright and a touch warmer, reaching near 59°F — prime for outdoor plans or getting a head start on Halloween decorations. By Monday, highs hold in the upper 50s while southerly winds pick up and humidity increases ahead of the next front.

Rain chances rise Tuesday as a low-pressure system passes across northern Illinois. Light to moderate showers could slow the morning commute, especially along I-55 and I-290. While severe storms aren’t in the cards, brief heavier bursts may slick up the roads. Expect occasional gusts near 20 mph, adding a lake-cooled bite to the breeze.

Skies begin to clear on Wednesday, and temperatures settle back into the mid-50s. The back half of the week looks seasonably cool — comfortable for mapping out trick-or-treat routes as Halloween approaches at week’s end.

Enjoy one more golden, dry weekend before conditions turn wetter and windier. A colder November is on the horizon, and this week’s showers are the opening act.

Five-Day Outlook for Chicago, IL:
– Saturday: 53/47 — Partly sunny; a brief morning sprinkle possible.
– Sunday: 59/46 — Sunny and mild; light southeast breeze.
– Monday: 57/47 — Mostly sunny; clouds increasing late.
– Tuesday: 56/47 — Cloudy with developing rain; occasionally breezy.
– Wednesday: 54/46 — Partly sunny; a few light showers may linger early.

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