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

26°F

-3°C

Humidity 53%
Wind Speed Calm
Barometer 30.34 in (1027.9 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Last update 22 Jan 8:54 am CST
Extended Forecast for

Rockbridge IL

Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Today

    Today: Mostly cloudy, with a high near 36. West wind 5 to 9 mph.

    High: 36 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 4. West wind 5 to 10 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 25 mph.

    Low: 4 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 9. Wind chill values as low as -15. North wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 9 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Northeast wind around 10 mph.

    Low: 1 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 11. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 11 °F

    Chance Snow
    then Snow
    Likely

  • Saturday Night

    Saturday Night: Snow. Low around 5. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 5 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 16.

    High: 16 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 20.

    High: 20 °F

    Cold

Detailed Forecast

Today
Mostly cloudy, with a high near 36. West wind 5 to 9 mph.
Tonight
Mostly cloudy, with a low around 4. West wind 5 to 10 mph becoming north 12 to 17 mph after midnight. Winds could gust as high as 25 mph.
Friday
Mostly cloudy and cold, with a high near 9. Wind chill values as low as -15. North wind 11 to 16 mph, with gusts as high as 24 mph.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Northeast wind around 10 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 11. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 5. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Sunday
A 40 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 16.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny and cold, with a high near 20.
Monday Night
Mostly clear, with a low around 7.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
8:51 am CST Jan 22, 2026
Forecast Valid:
9am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
Forecast Discussion
 
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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