WEDNESDAY NIGHT: Becoming clear and chilly for the season with patchy frost developing. Lows ranging from the low/mid 30s coldest outlying areas to the lower 40s downtown Chicago. Winds: West 5-10 mph. Low: 38. ⚠️ Frost Advisory: 1 a.m. to 8 a.m. | Check current Weather Alerts THURSDAY: Turning a bit milder following a frosty start [...]