Chicago, Illinois – Darkening clouds are gathering on the horizon, and what starts as a relatively quiet Sunday morning could quickly turn into a soaking afternoon across northern Illinois. Drivers heading out later today may encounter wet pavement, reduced visibility, and localized flooding concerns, especially south of Interstate 80.
According to the National Weather Service in Chicago, a Hydrologic Outlook remains in effect as a steady rainfall event develops through Sunday afternoon and evening. Rainfall totals exceeding 2 inches are possible south of I-80, where the greatest flooding concern exists.
Meteorologists are also monitoring a broader Midwest weather pattern capable of producing flash flooding and strong thunderstorms. While the most significant severe weather remains west of Illinois, the slow-moving nature of today’s rain could create localized flooding issues where heavier bands persist.
The Chicago metro begins the day with comfortable temperatures near 70 degrees, but showers become increasingly likely after early afternoon. Rain chances climb to 80 percent by evening, with breezy northeast winds gusting up to 30 mph along portions of the lakefront and open areas.
Travelers on I-55, I-57, I-80, and I-294 should plan extra time later today. Low-lying roads, construction zones, and flood-prone intersections could see standing water if heavier rainfall develops.
Conditions improve Monday as drier air arrives behind the system. Sunshine gradually returns, though temperatures remain cooler with highs in the upper 60s. By midweek, readings rebound toward 80 degrees as summer warmth returns to northern Illinois.
Long-range outlooks continue to signal above-normal temperatures developing across the Midwest later next week.
Five Day Forecast for Chicago, Illinois
- Sunday: High 69°F, showers developing, 80% rain chance.
- Sunday Night: Low 60°F, showers and breezy conditions.
- Monday: High 68°F, becoming mostly sunny and breezy.
- Tuesday: High 75°F, mostly sunny.
- Wednesday: High 79°F, chance of showers and thunderstorms.
