Weather World
Tri-County, IL 7-Day Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Tri-County Weather Forecast
Tri-County, IL Weather Forecast Date: 322 AM CDT Wed Sep 09 2026
Weather forecast for Tri-County, IL
Today Hi: 79°FHi: 26°C Lo: 65°F Lo: 18°C |
Today... Mostly cloudy. Showers with a chance of thunderstorms this morning, then a chance of showers with a slight chance of thunderstorms this afternoon. Cooler with highs in the upper 70s. West winds 5 to 10 mph. Chance of rain 90%. |
Thu Hi: 80°FHi: 27°C Lo: 59°F Lo: 15°C |
Thursday... Mostly sunny. Highs around 80. Northeast winds around 5 mph. |
| Fri Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Friday... Sunny. Highs in the mid 80s. Southeast winds 5 to 10 mph. |
Sat Hi: 85°FHi: 29°C Lo: 61°F Lo: 16°C |
Saturday... Partly sunny. A chance of showers in the morning. Highs in the mid 80s. Chance of rain 40%. |
| Sun Hi: 85°FHi: 29°C Lo: 69°F Lo: 21°C |
Sunday... Partly sunny with a 30% chance of showers. Highs in the mid 80s. |
Mon Hi: 89°FHi: 32°C Lo: 65°F Lo: 18°C |
Monday... Mostly sunny with a chance of showers. Highs in the upper 80s. Chance of rain 40%. |
| Tue Hi: 80°FHi: 27°C |
Tuesday... Partly sunny. A chance of showers in the morning. Highs around 80. Chance of rain 30%. |
Tri-County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...