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

27°F

-3°C

Humidity 72%
Wind Speed N 7 mph
Barometer 30.42 in (1030.5 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 27 Nov 11:54 pm CST
Extended Forecast for

3 Miles SSW Dow IL

Winter Storm Watch November 29, 12:00am until November 30, 12:00am
Click here for hazard details and duration
Winter Storm Watch

  • Overnight

    Overnight: Clear, with a low around 20. Northwest wind around 7 mph.

    Low: 20 °F

    Clear

  • Friday

    Friday: Increasing clouds, with a high near 36. Northwest wind around 5 mph becoming light and variable.

    High: 36 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Snow, mainly after 2am. Low around 30. Southeast wind 5 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 30 °F

    Chance Snow
    then Snow

  • Saturday

    Saturday: Snow before noon, then rain and snow. High near 35. Southeast wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 35 °F

    Snow then
    Rain/Snow

  • Saturday Night

    Saturday Night: Rain and snow likely before midnight. Cloudy, with a low around 24. South wind 11 to 16 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 24 °F

    Rain/Snow
    Likely then
    Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

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

    Low: 14 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 25.

    High: 25 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Chance Snow

Detailed Forecast

Overnight
Clear, with a low around 20. Northwest wind around 7 mph.
Friday
Increasing clouds, with a high near 36. Northwest wind around 5 mph becoming light and variable.
Friday Night
Snow, mainly after 2am. Low around 30. Southeast wind 5 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Saturday
Snow before noon, then rain and snow. High near 35. Southeast wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Saturday Night
Rain and snow likely before midnight. Cloudy, with a low around 24. South wind 11 to 16 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Sunday
Mostly cloudy, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 25.
Monday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Mostly sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 23.
Thursday
Mostly cloudy, with a high near 35.
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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:
9:31 pm CST Nov 27, 2025
Forecast Valid:
12am CST Nov 28, 2025-6pm CST Dec 4, 2025
 
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