Illinois — Streetlights blur into halos as damp air hangs low across the metro before sunrise.
Patchy fog and drizzle are already affecting parts of the Chicago area early this morning. Visibility remains decent near the lake, but areas south of I-80 face the highest fog risk. Where fog develops, visibility may drop below half a mile, especially on suburban and rural roads.
Temperatures hover near 43 degrees, keeping pavement wet and slick. Drizzle continues in spots, creating uneven travel conditions. Drivers heading out early should slow down and expect sudden changes in visibility, particularly on I-80, I-57, and local connectors.
Fog risk gradually eases later this morning as low clouds lift. Even so, skies stay mostly cloudy through the day. Highs reach near 41 degrees, cool but manageable for Christmas travel and errands.
By evening, attention shifts to the next system. Showers move in overnight, with rain becoming more widespread by Friday morning. Patchy fog may redevelop briefly ahead of the rain. Temperatures climb toward 48 degrees, keeping precipitation liquid for now.
Friday night stays cloudy, then Saturday brings a quieter break. Expect mostly cloudy skies and highs near 44 degrees, suitable for regional travel. Roads remain wet but conditions improve overall.
Saturday night into Sunday signals another change. Rain chances increase Sunday afternoon, with highs near 49 degrees. Gusty winds develop late, hinting at colder air behind the system.
By Sunday night into Monday, winter reasserts itself. Winds strengthen, temperatures tumble, and blustery conditions take over. Monday highs struggle into the 20s, with a limited cold risk flagged by forecasters. Wind chills dip even lower, marking the sharpest cold snap of the season so far.
Looking ahead to post-Christmas travel, the pattern turns colder and drier. No snow is expected immediately, but the cold could create icy patches where moisture lingers.
For now, fog and drizzle are the immediate concern. Later, cold takes center stage. Plan ahead, drive cautiously, and prepare for winter’s return to Chicago.
