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.

Overcast

23°F

-5°C

Humidity 50%
Wind Speed NE 9 mph
Barometer 30.29 in (1026.1 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 29 Jan 2:54 pm CST
Extended Forecast for

3 Miles SSW Dow IL

  • This Afternoon

    This Afternoon: A 40 percent chance of snow after 4pm. Cloudy, with a high near 23. Northeast wind around 7 mph.

    High: 23 °F

    Chance Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 9pm. Cloudy, with a low around 3. North wind 3 to 7 mph.

    Low: 3 °F

    Chance Snow
    then Cloudy

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny and cold, with a high near 17. Light north wind increasing to 6 to 11 mph in the morning.

    High: 17 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 3. Wind chill values as low as -10. North wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 3 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 19. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of snow after 4pm. Cloudy, with a high near 23. Northeast wind around 7 mph.
Tonight
A 40 percent chance of snow, mainly before 9pm. Cloudy, with a low around 3. North wind 3 to 7 mph.
Friday
Cloudy, then gradually becoming mostly sunny and cold, with a high near 17. Light north wind increasing to 6 to 11 mph in the morning.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 3. Wind chill values as low as -10. North wind 9 to 11 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny and cold, with a high near 19. Northwest wind 7 to 14 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 1.
Sunday
Partly sunny, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 33.
Monday Night
Mostly cloudy, with a low around 18.
Tuesday
A 20 percent chance of snow. Mostly cloudy, with a high near 34.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 23.
Wednesday
A 20 percent chance of snow. Mostly cloudy, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
Partly sunny, with a high near 33.
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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:
3:16 pm CST Jan 29, 2026
Forecast Valid:
3pm CST Jan 29, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation