Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

31°F

-1°C

Humidity 49%
Wind Speed NW 13 G 22 mph
Barometer 30.05 in (1018.1 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 18 Jan 10:54 pm CST
Extended Forecast for

Rockbridge IL

Cold Weather Advisory January 19, 03:00am until January 19, 10:00am
Click here for hazard details and duration
Cold Weather Advisory
  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 7. Blustery, with a northwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph.

    Low: 7 °F

    Decreasing
    Clouds and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 18. Wind chill values as low as -10. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 18 °F

    Sunny and
    Blustery then
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 9. West wind around 6 mph becoming light and variable  after midnight.

    Low: 9 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33. Southwest wind 5 to 9 mph.

    High: 33 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. Southeast wind 6 to 13 mph becoming southwest after midnight. Winds could gust as high as 22 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 32.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 7. Blustery, with a northwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph.
M.L.King Day
Sunny and cold, with a high near 18. Wind chill values as low as -10. Blustery, with a northwest wind 15 to 20 mph decreasing to 8 to 13 mph in the afternoon. Winds could gust as high as 30 mph.
Monday Night
Increasing clouds, with a low around 9. West wind around 6 mph becoming light and variable after midnight.
Tuesday
Mostly sunny, with a high near 33. Southwest wind 5 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 24. Southeast wind 6 to 13 mph becoming southwest after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 41.
Wednesday Night
Partly cloudy, with a low around 19.
Thursday
Sunny, with a high near 32.
Thursday Night
Partly cloudy, with a low around 18.
Friday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 33.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 11.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 21.
Saturday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 2.
Sunday
A 20 percent chance of snow. Partly sunny and cold, with a high near 16.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
9:36 pm CST Jan 18, 2026
11pm CST Jan 18, 2026-6pm CST Jan 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database