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.

Partly Cloudy

8°F

-13°C

Humidity 63%
Wind Speed NW 13 mph
Barometer 30.57 in (1035.8 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill-8°F (-22°C)
Last update 31 Jan 8:54 am CST
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: Mostly sunny and cold, with a high near 20. Wind chill values as low as -10. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 20 °F

    Cold

  • Tonight

    Tonight: Mostly clear, with a low around 2. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 2 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 28. Light south wind increasing to 5 to 10 mph in the morning.

    High: 28 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18. South wind 5 to 7 mph becoming west after midnight.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 37. West wind around 6 mph.

    High: 37 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 32.

    High: 32 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny and cold, with a high near 20. Wind chill values as low as -10. Northwest wind 8 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 2. Northwest wind 5 to 7 mph becoming calm in the evening.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 28. Light south wind increasing to 5 to 10 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 18. South wind 5 to 7 mph becoming west after midnight.
Monday
Mostly sunny, with a high near 37. West wind around 6 mph.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 32.
Tuesday Night
Mostly cloudy, with a low around 14.
Wednesday
Partly sunny, with a high near 28.
Wednesday Night
Partly cloudy, with a low around 9.
Thursday
Partly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Mostly sunny, with a high near 41.
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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:
4:06 am CST Jan 31, 2026
Forecast Valid:
8am CST Jan 31, 2026-6pm CST Feb 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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