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

16°F

-9°C

Humidity 51%
Wind Speed SW 10 mph
Barometer 30.16 in (1021.9 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 18 Jan 9:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

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

  • Today

    Today: Cloudy, with a high near 30. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 30 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 9. Blustery, with a northwest wind 13 to 22 mph, with gusts as high as 36 mph.

    Low: 9 °F

    Gradual
    Clearing and
    Blustery

  • M.L.King Day

    M.L.King Day: Sunny and cold, with a high near 20. Northwest wind 8 to 18 mph, with gusts as high as 30 mph.

    High: 20 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. West wind 5 to 7 mph.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. South wind 7 to 11 mph.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 21.

    Low: 21 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

Detailed Forecast

Today
Cloudy, with a high near 30. Southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 9. Blustery, with a northwest wind 13 to 22 mph, with gusts as high as 36 mph.
M.L.King Day
Sunny and cold, with a high near 20. Northwest wind 8 to 18 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 11. West wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 36. South wind 7 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Mostly sunny, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Sunny, with a high near 35.
Thursday Night
Partly cloudy, with a low around 26.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 42.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
Last Update:
8:22 am CST Jan 18, 2026
Forecast Valid:
10am CST Jan 18, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation