Tri-County, IL Weather Forecast

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Tri-County, IL Weather Forecast

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Tri-County IL weather  - Overcast - 51°F
Overcast
51°F
Updated 7:32 pm
Feels Like 46°F
Humidity 95%
Wind SW 8 mph
Barometer  29.76 in
Dew Point 50°F
Tri-County IL weather  - Overcast - 10°C
Overcast
10°C
Updated 7:32 pm
Feels Like 8°C
Humidity 95%
Wind SW 13 km/h
Barometer  100.8 kPa
Dew Point 10°C

Tri-County Weather Forecast

TONIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY
Tri-County, IL Weather - Tonight Drizzle Tri-County, IL Weather - Thursday Chance Of Rain Tri-County, IL Weather - Thursday Night Chance Of Rain Tri-County, IL Weather - Friday Mostly Sunny Tri-County, IL Weather - Friday Night Mostly Clear Tri-County, IL Weather - Saturday Mostly Clear Tri-County, IL Weather - Saturday Night Mostly Clear Tri-County, IL Weather - Sunday Sunny Tri-County, IL Weather - Sunday Night Clear Tri-County, IL Weather - Monday Sunny Tri-County, IL Weather - Monday Night Clear Tri-County, IL Weather - Tuesday Sunny
Drizzle Chance of Rain Chance of Rain Mostly Sunny Mostly Clear Mostly Clear Mostly Clear Sunny Clear Sunny Clear Sunny
Lo: 45°FLo: 7°C Hi: 55°FHi: 13°C
Lo: 39°FLo: 4°C Hi: 49°FHi: 9°C
Lo: 29°FLo: -2°C Hi: 51°FHi: 11°C
Lo: 31°FLo: -1°C
Hi: 51°FHi: 11°C
Lo: 31°FLo: -1°C
Hi: 59°FHi: 15°C
Lo: 35°FLo: 2°C Hi: 61°FHi: 16°C
Lo: 39°FLo: 4°C Hi: 61°FHi: 16°C
POP: 40% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 422 PM CST Wed Nov 04 2026 Tri-County, IL Weather - WeatherWorld.com

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Issued: 509 PM CST Wed Nov 4 2026

Key Messages

  • Cool and breezy conditions will persist through Thursday with periods of light rain or drizzle.
  • Near freezing temperatures will impact the region Friday night and Saturday night.

Discussion

... Issued at 115 PM CST Wed Nov 4 2026

Upper analysis early this afternoon shows an expansive trough/closed low located over the Upper Mississippi Valley. At the surface, a ~1000 mb occluded low is centered over northern Wisconsin with its trailing cold front stretched from the northern Great Lakes ...