National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

3°F

-16°C

Humidity 60%
Wind Speed NW 9 mph
Barometer 30.39 in (1029.8 mb)
Dewpoint -8°F (-22°C)
Visibility 10.00 mi
Wind Chill-11°F (-24°C)
Last update 26 Jan 12:54 am CST
Extended Forecast for

Rockbridge IL

Extreme Cold Warning until January 26, 12:00pm
Click here for hazard details and duration
Extreme Cold Warning
  •  
    Extreme Cold Warning until January 26, 12:00pm

    NOW until 12:00pm Mon

    Extreme Cold Warning

  • Overnight

    Low: -9 °F

    Mostly Clear

  • Monday

    Monday: Sunny and cold, with a high near 12. Wind chill values as low as -25. Northwest wind 8 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 12 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a temperature rising to around 11 by 4am. Wind chill values as low as -10. Southwest wind 8 to 13 mph, with gusts as high as 25 mph.

    Low: 6 °F⇑

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 26. Southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 26 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around -4. Northwest wind around 6 mph becoming calm in the evening.

    Low: -4 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -3.

    Low: -3 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny and cold, with a high near 16.

    High: 16 °F

    Cold

Detailed Forecast

Overnight
Mostly clear, with a low around -9. Wind chill values as low as -25. Northwest wind around 8 mph.
Monday
Sunny and cold, with a high near 12. Wind chill values as low as -25. Northwest wind 8 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a temperature rising to around 11 by 4am. Wind chill values as low as -10. Southwest wind 8 to 13 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 26. Southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Tuesday Night
Mostly clear, with a low around -4. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Partly cloudy, with a low around -3.
Thursday
Partly sunny and cold, with a high near 16.
Thursday Night
Mostly cloudy, with a low around 0.
Friday
Mostly sunny and cold, with a high near 16.
Friday Night
Mostly clear, with a low around -4.
Saturday
Mostly sunny and cold, with a high near 19.
Saturday Night
Partly cloudy, with a low around 3.
Sunday
Partly sunny, with a high near 28.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
10:16 pm CST Jan 25, 2026
Forecast Valid:
1am CST Jan 26, 2026-6pm CST Feb 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation